Do you want to do some volunteer work while exploring Africa? Then join in our 21-Day Flagship Program. Step onto the flat, sandy land of Ghana, and you'll immediately hear the laughter of children everywhere. This laughter will be the constant (常数，恒量）of your trip and a steady source of energy while you volunteer among one of Africa s kind communities.

    Community Service

    Volunteer in primary schools, working with children of different ages to help improve their English skills, tutor(担任...的家教) those who might be falling behind and contribute to each school's needs, including making improvements to the facilities(设施，设备). Split your time between teaching and campus refurbishment (翻修) projects to serve every aspect of the school, and learn all about education in Ghana.

    Hands-on Learning

    Participate in workshops such as batik cloth dyeing (蜡染), drumming, dancing and crash courses in the native language, Ewe or Krobo. You'll be given a Ghanaian name by the local chief of your village, and visit a seamstress (女裁缝) to have custom clothing made out of colorful fabrics you purchase(购买). On the 21-Day Flagship Program, you'll hear about the nation's history as a center of the slave trade, and visit Fort Prinzenstein to truly understand the significance of this topic.

    Adventure

    You'll also experience the natural surroundings of Ghana with a beautiful waterfall hike: On your 21-Day Flagship Program, go on a two-night trip where you'll get to visit a monkey shelter.

    Lodging

    Global Leadership Adventures (GLA) operates two Home Bases for the 21-day program. Both are located outside of the capital city of Accra in rural village settings. Accommodations are basic, but clean and safe. Students sleep in rooms with roommates, and have access to shared bathrooms with cold-water showers.

    Dates

    June 26-July 16, 2019

    July 9-July 29, 2019

    July 20-August9, 2019

    Duration: 21 days

    Tuition: $5,399

    Community Service Hours: 60

    For more information, please call 1-858-771-0645 or send an email to info@experiencegla.com.

    Black Friday

    The day after Thanksgiving is the start of the holiday shopping season. Thanksgiving is always on a Thursday, so the day after is a Friday. This day has come to be known as Black Friday. It has been the busiest shopping day of the year since 2005.

    Most stores offer great deals on Black Friday. They open their doors in the small hours of the morning. They try to attract shoppers with big discounts. Some items like TVs are much cheaper than usual. Stores may even lose money on these items. They hope that shoppers will buy gifts for other people while they are in the store.

    Black Friday is a great time to get good deals. The problem is that there are not enough low-priced items to go around. Each store may only have a few. These items are in high demand. People stand in long lines to get such great deals. They may line up hours before a store opens. They may be hoping to get a low price on a TV or laptop, but not everyone who wants one will get one. Some people leave disappointed.

    The situation can be tense(紧张的). Some Black Friday events have been violent. Large, eager crowds have trampled(践踏) workers. Fights have broken out over toys or people cutting in line. People have shot one another over parking spots. But most Black Friday events are safe and fun. Still, if you plan on going, expect large crowds and a bit of pushing and shoving.

    So where does the name "Black Friday" come from? It was first used in Philadelphia in the 1950s. The police called this day Black Friday because of the heavy traffic it drew. In the 1960s, spread across the country. It seems that it is here to stay.

    Now people all over the country take part in the event known as Black Friday. It is even spreading to other parts of the world. Stores have held Black Friday events in the U.K., Australia, and Brazil since 2012. In Costa Rica Black Friday is known as "Viernes Negro." And in Mexico, stores offer an annual weekend of discounts. They call it "El Buen Fin," which means "the good weekend" in Spanish. I guess the language of savings is universal.

    I must have always known reading was very important because the first memories I have as a child deal with books. There was not one night that I don't remember mom reading me a storybook by my bedside. I was extremely inspired by the elegant way the words sounded.

    I always wanted to know what my mom was reading. Hearing mom say," I can't believe what's printed in the newspaper this morning," made me want to grab it out of her hands and read it myself. I wanted to be like my mom and know all of the things she knew. So I carried around a book, and each night, just to be like her, I would pretend to be reading.

    This is how everyone learned to read. We would start off with sentences, then paragraphs, and then stories. It seemed an unending journey, but even as a six-year-old girl I realized that knowing how to read could open many doors. When mom said," The C-A-N-D-Y is hidden on the top shelf," I knew where the candy was. My progress in reading raised my curiosity, and I wanted to know everything. I often found myself telling my mom to drive more slowly, so that I could read all of the road signs we passed.

    Most of my reading through primary, middle and high school was factual reading. I read for knowledge, and to make A's on my tests. Occasionally, I would read a novel that was assigned, but I didn't enjoy this type of reading. I liked facts, things that are concrete. I thought anything abstract(抽象的) left too much room for argument.

    Yet, now that I'm growing and the world I once knew as being so simple is becoming more complex, I find myself needing a way to escape. By opening a novel, I can leave behind my burdens and enter into a wonderful and mysterious world where I am now a new character. In these worlds I can become anyone. I don't have to write down what happened or what technique the author was using when he or she wrote this. I just read to relax.

    We're taught to read because it's necessary for much of human understanding. Reading is a vital part of my life. Reading satisfies my desire to keep learning. And I've found that the possibilities that lie within books are limitless.

    It began as a game: High school and college students studying computer technology figured out they could use personal computers to break into telephone company computers and make free, long-distance telephone calls. These young computer talents soon gained the name "hackers".

    Police arrested a few hackers, but many went on to even more complex hacking. One of them was arrested for making illegal telephone calls and later he used a phone to change a police officer's credit records to get back at the officer for arresting him. He also used a computer to change his college records to give himself better grades.

    As hackers gained experience  they began invading computers at banks, airlines and other businesses. In one case a hacker instructed an airline's computer to give him free airplane tickets.

    The U.S. government is worried that hackers may break into its networks of defense computers. The government's secrets are easily attacked because thousands of government computers are connected by telephone lines that hackers can get into.

    In November 1988, a college student entered a U.S. Defense Department computer network called Arpanet. The hacker injected a computer program that made copies of itself throughout Arpanet. Some hackers use viruses to destroy all the data in a computer. But in this case, government officials shut down the network before the program reached every computer in the system. Shutting down the system angered many researchers who were using the computers. The hacker turned himself in to the police and he was charged with a crime.

    The incident put the spotlight on computer hacking in the United States. Many companies have hired experts to protect their computers from hackers, and many computer experts now advise companies on how to protect their computers.

    The U.S. government believes foreign governments have hired hackers to try to break into top-secret defense computers.

    Experts disagree over whether a computer network can ever be safe from hacking. But in the future, some of the most outstanding minds in the U.S. will be working to frustrate the attempts of computer hackers.

    There have been a lot of comments recently surrounding 5G, the next generation of wireless technology. ? How might it change our lives?

    5G stands for fifth generation, meaning the next step in the progression(进步；进展) of technology to replace the current(现在的) 4G system. Earlier "G" systems were designed to improve mobile communication operations. Each new technology brought major improvements in speed and greatly increased network capacity (容量). . It is expected to permit more users to do more things at a faster rate.

    However, technology experts say there is a major way that 5G is different from the earlier systems. . It will affect many more devices and industries than other "G" versions(版本).

    5G will help fuel future "smart cities" by connecting sensor networks. 5G is also expected to connect self-driving cars and support new technologies involving virtual reality (虚拟现实). Higher 5G speeds could also permit doctors to commonly perform remote medical operations. Factories and businesses could use 5G technology to increase automation and improve the collection of information.

    . The increased data flow across 5G networks would give Internet attackers a lot more possibilities to steal and misuse data. In addition, the wider use of a 5G wireless network means any breakdown of the system would have more widespread and severe results. Such difficulties could affect public safety. , or a network breakdown could cause self-driving vehicles to crash.

A. Why is 5G so popular

B. What is this technology

C. Every coin has two sides

D. The new 5G system promises more of the same

E. It will move beyond mobile network technology

F. A breakdown of 5G networks may cause economic losses

G. A failure during a doctor's remote operation could lead to death

    It was the last day of the final examination in a large eastern university. On the steps of one building, a group of engineering seniors gathered, discussing the exam due to begin in a few 1. On their faces was confidence. This was their last exam before they went on to 2and jobs.

    Some talked of jobs they already had; others talked of jobs they 3get. With all this assurance(确信，自信） of four years of college, they felt ready and able to take 4of the world.

    The approaching exam, they knew, would be a(n) 5task, because the professor had said they could bring 6books or notes they wanted, requesting only that they did not 7each other during the test.

    After they entered the classroom8, the professor passed out the papers. And smiles9on the students' faces as they noted there were only five essay-type questions.

    Three hours had passed 10the professor began to collect the papers. The students no longer looked confident. On their faces was a frightened expression. Papers in hand, no one spoke as the professor faced the class.

    He looked at the11 faces before him, and then asked, "How many completed all five questions?"12a hand was raised.

    "How many answered four?" Still no hands.

    "Three? Two?" The students moved restlessly(不安地) in their seats.

    "One, then? Certainly somebody finished 13."But the class remained silent.

    The professor put down the papers. "That is exactly what I 14," he said. "I just want to impress upon you that, 15you have completed four years of engineering, there are still many things about the 16you don't know. These questions you couldn't answer are relatively 17 in everyday practice." Then smiling, he added, "You will all 18this course, but remember — even if you are now college graduates, your education has just 19."

    The years have 20the name of this professor, but not the lesson he taught.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词，多改不给分。

2）一定要用所给标识，否则，不给分。

1）介绍购物情况；

2）反映存在问题；

3）提出解决方案。

注意：1）词数100左右；

2）可适当增加细节，以使行文连贯；

3）开头和结尾已给出，不计入总词数。

Dear Sir/ Madam,

Yours truly,

Li Hua