Since a university education in the United States {#blank#}1{#/blank#}(be)very expensive, most students work in addition to studying. Students {#blank#}2{#/blank#}(usual)work part-time, but some students take full-time jobs.

    A typical job for a students would be working {#blank#}3{#/blank#}a waiter or waitress. Other typical off-campus jobs would include being a clerk in a store or delivering pizza. Sometimes students also find jobs on campus such as cleaning, working in a cafeteria or library or answering {#blank#}4{#/blank#}(telephone). Most student jobs are entry-level and low paying, but have flexible schedule {#blank#}5{#/blank#}(allow) students to attend classes.

    Sometimes students also hold more responsible positions such as managers, or if they are lucky, positions in their area of study, {#blank#}6{#/blank#} they hope will help them find employment after they graduate.

    {#blank#}7{#/blank#}double responsibilities of working and studying result in a very busy, {#blank#}8{#/blank#} (stress)life for some students. {#blank#}9{#/blank#}, it is the only way for many people to finance their college educations. Some Americans believe that the work experience is good for the students {#blank#}10{#/blank#}(they)since it gives them a taste of “the real world” outside the school.

    As I write this, I'm sitting on a bus back to Santiago in Chile where I am currently working{#blank#}1{#/blank#}a language assistant. I've just spent the weekend in a city called La Serena north of Santiago. I was lucky enough to see the flowering desert, a natural phenomenon that {#blank#}2{#/blank#}(occur) around every five years here in the Atacama Desert.

    {#blank#}3{#/blank#}(follow) a particularly large amount of rainfall earlier, a{#blank#}4{#/blank#}(vary) of flowers come into blossom. Bright purple flowers create {#blank#}5{#/blank#} unbelievably beautiful scene at the base of the surrounding mountains.

    {#blank#}6{#/blank#}(catch) a glimpse of this magnificent treasure of nature, we took a bus from La Serena to a nearby town and then rented a car to go to the desert.{#blank#}7{#/blank#} we saw did not disappoint us, and as expected it was even more fascinating than the pictures we had seen online. The bloom was particularly {#blank#}8{#/blank#}(impress) this year due to the strong presence of El Niño (a band of warm water in the Pacific Ocean that changes the temperatures and increases the rainfall in certain areas). The vast carpet of colour {#blank#}9{#/blank#} spread into the distance towards the contrasting green hills was {#blank#}10{#/blank#}(simple) breathtaking and deserved a large amount of photos! A real reminder of the beauty our planet can provide.

    The Great Wall was listed as a World Heritage by UNESCO in 1987. Just like a dragon, it winds up and down across deserts, grasslands and mountains,{#blank#}1{#/blank#}( run) approximately 21,196 kilometers from east to west.

    The{#blank#}2{#/blank#}( construct) of the Great Wall was not that easy, {#blank#}3{#/blank#}drew heavily on the local resources for building materials. The walls were{#blank#}4{#/blank#}( original) built in the Spring & Autumn Period and the Warring States Period. Emperor Qin Shi Huang succeeded in his effort to have them joined together. Since then, the Great Wall{#blank#}5{#/blank#}( serve) as a monument of the Chinese nation throughout history.

    With {#blank#}6{#/blank#}history of about 2,700 years, some parts of the Great Wall are now {#blank#}7{#/blank#}ruins or have disappeared. However, the Great Wall of China is still one of the most appealing{#blank#}8{#/blank#}(attraction) all around the world owing to its historical significance. The best-known part of the Great Wall of China, Badaling, {#blank#}9{#/blank#}(locate) 43 miles northwest of Beijing, attracts thousands of national and foreign tourists every day.

    Today, the Great Wall{#blank#}10{#/blank#}(recognize) as one of the most important impressive architectural achievements in history.

    Exercise could not only benefit your body, but also improve your memory, researchers found{#blank#}1{#/blank#}(recent).

    In their paper, researchers in the United States and Japan{#blank#}2{#/blank#}(introduce) their experiment and conclusion.

    Scientists invited 36 volunteers{#blank#}3{#/blank#}were in their early 20s to do 10 minutes of light exercise before taking a memory test in which they{#blank#}4{#/blank#}(show) pictures like broccoli(西兰花) or picnic baskets and asked to recall them later. The same experiment was repeated with the same group of volunteers without exercising. “The memory task really was quite{#blank#}5{#/blank#}(challenge),” said Michael Yassa, co-author of the study. “ We used very similar items to see if they would remember {#blank#}6{#/blank#}it was this exact picnic basket versus that picnic basket.”

    Researchers also scanned brains of some of the participants during the experiment.

    They found increased communication between parts{#blank#}7{#/blank#}(involve) in the storage and recollection of memories in brains of those who had exercised.

This suggested that just 10 minutes of light exercise might have a positive effect {#blank#}8{#/blank#}memory power.

    As all{#blank#}9{#/blank#}volunteers in the experiment were relatively young, researchers are still working{#blank#}10{#/blank#}(look) at the influence of light exercise on older people. “Our main goal is to try to develop an exercise way that can be used by older adults who might have disabilities,” said Yassa.