I had a good time on my vacation. I spent my vacation trekking(徒步旅行)in Nepal, a small country in the Himalaya Mountains of Asia.

    On the trekking vacation, I walked for a long time through the mountains. There are very few roads in Nepal, so trekking is the best way to travel. It will be better if you have a guide. The guides know the best paths to take and they can also help trekkers with their bags. Sometimes our guide cooked food for us. Every day, we trekked for about four hours in the morning, and two hours in the afternoon. We slept in the large tents. It was very interesting. I didn't want to go home in the end.

    Information Card

    Do you like sports? Do you play basketball or baseball in your P.E. class or after school?

    My sister and I like sports very much. (A) We are in our school tennis club__俱乐部）.We play tennis in the morning. It's very interesting. First, we do some exercises(热身练习）.Then, the teacher teaches tennis. We watch him carefully. Later, we play in pairs. Some boys can play very well，but we can't. They often come to help  us. Our teacher is glad to see this. He says our school has many clubs. “Do you like sports?” “Yes，we do, we answer.

    Sports are really fun, and they are good for us.

根据短文内容完成下列任务。

A School in Britain

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    I get up and get dress for school. My school has a uniform-black trousers and shoes, a white shirt and a black and gold tie. The girls wear the same, or they can wear a black skirt.

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    I don't live far from the school, so l walk there with my friends. Lots of students take the school or their parents drive them to school.

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    Students all study English, maths and science, and we can choose others. My favorites are arts and IT.

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    We have 20 minutes for break in the morning and an hour for lunch. Some students bring sandwiches to school for lunch, hut my friends and I often eat in the dinning room.

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    Lessons end at 4 o'clock, but on Mondays and Wednesdays I stay at school until 5 o'clock. I go to the Chess Club and Basketball Club. There are lots of clubs and activities at our school.

    This is a home of the future, a smart home, where technology can do almost everything. Imagine we are in the year 2050; ①the computer wakes Tom up in the morning as usual. In front of him is a to-do list of the important events for the day, and it is provided by the computer， too. According to Tom's request, the computer serves a list of possible dishes. All the dishes are nice.

    As Tom eats breakfast, the computer reminds him to reply to Lucy. Before Tom finishes his next bite, Lucy's computer receives the message. Then Tom goes to the supermarket. The store's system checks his car when he drives to the pickup area and greets him. "Good morning, Tom! Your order is in Case 4. Thank you for shopping." When Tom removes his order from Case 4, the trade is completed automatically(自动地) over the information superhighway. That is, the money is electronically paid into the bank. Soon after arriving at the office, Tom reads another message from Lucy, telling him that she will go to have dinner with him.

    The smart home can also do many other things:

    Find things like keys and mobile phones.

    ②        (打开或关闭) machines and lights with your voice.

    Clean your home from clothes to buildings automatically.

    Record everything and everyone entering and leaving the house.

    Take care of each member of the family, young or old.

    ③With the development of technology, the smart home will come true in the future. It is sure to play an important part in our life.

How do blind people get around safely? Some people use special guide dogs. A well-trained dog knows how to help its owner cross busy streets and get from place to place. Some people use long white canes（手杖）to help them get around. 

Guide dogs and canes are helpful, but there must be a better way for blind people to get around. A scientist in England thought so. His name is Waters and he studies bats（蝙蝠）. He knows that bats are able to fly in the dark. Besides, he knows that bats go by using sound to "see". Dr. Waters wondered if people could do something similar. 

Bats make sounds as they fly. These sounds travel in waves（波）in the air. When the waves hit an object such as a tree or house, they bounce back（反射回来）. The waves travel back to the bat's ears. A bat learns the location and shape of objects around it. 

Dr. Waters talked to other scientists, including Withington from America and Hoyle from Germany. They worked together and invented a new kind of cane. They called it a "bat cane" because their idea started with bats. The new cane has a computer in the handle（手柄）.  ▲  The sound waves hit objects and echoes（回声）back. This causes the handle to make sounds, which humans can hear. 

With a little training, a person using the cane can easily tell where objects are and can "see" with sound! 

Imagine you are going to give a speech the next day.The night before, you spend a lot of time thinking about the possible mistakes you might make and whether you're prepared enough. Well, you might be overthinking. 

Overthinking means going over the same thought again and again, analyzing( 分 析 ) the simplest situations or events too much. 

According to The Conversation, overthinking comes from one of our primitive instincts(原始 本能). The primitive mind will always see things in the worst possible light.Our brains are always looking for threats(威胁), to make a plan to deal with those threats and keep us safe. 

Some people believe that overthinking may be helpful because it helps us look at a problem from every possible angle(角度) and get ready for what might happen. However, research suggests that overthinking can make us stressed, anxious(焦虑的) and depressed (忧郁的). 

What's more, overthinking might create problems with how you get along with others.As you think the worst, make incorrect guesses, or worry about every little thing others do and say, you might misunderstand their intentions(意图). 

So, instead of sitting and thinking about a problem again and again, you can distract(转移注意 力）yourself for a bit. Your brain might find better ways to solve the problem while you're doing something fun, like gardening(园艺), or even while you're sleeping. 

Also, when you find yourself overthinking, challenge these thoughts. Ask yourself if they make sense and think about other possibilities.It can be hard at first,but recognizing that you are overthinking can help you make a change.