摘要: because, why引导的表语从句 That's because he didn't understand me. 那是因为他没有理解我. (That's because...强调原因) That's why he got angry with me. 那正是他对我生气的原因. (That's why...强调结果) what引导的主语从句表示结果或名词reason作主语时.后面的表语从句表示原因时要用that引导.不宜用because. The reason why I was sad was that he didn't understand me. 我难过的原因是他没有理解我.

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There are many ways for us to reduce(减少) waste. For   16 , we can reduce paper and plastic bags. We can also recycle newspapers, glass, and cans(易拉罐) to make new things. Here are some useful ways to   17  waste.
Write on   18  sides of paper
Many people write on only one side of their paper. Why not stop wasting the other side? Some students only use half the pages of their   19  before getting new ones. Try to use up all the paper. People often give cards on birthdays or festivals. How about trying to   20  e-cards instead?
Don't throw away your old batteries.
Maybe you do not know that old batteries make the earth   21 . This is because they have poisonous parts in them. So, don't throw away batteries.   22  them together. Try to use rechargeable(充电的) batteries for your games and CD players.
Give off all your unwanted clothes
There are many poor families in China. You may ask your mother to   23  your unwanted clothes. Then you can pass them on to those poor children. You will feel
  24  that you are helping someone else. Also, you can understand   25  your friends or relatives(亲戚) want them before throwing them away.
【小题1】
A.reason B.example C.use D.people
【小题2】
A.produce B.protect C.reduce D.pollute
【小题3】
A.every B.both C.all D.one
【小题4】
A.exercisesB.schoolbags C.notebooks D.papers
【小题5】
A.send B.buy C.receive D.waste
【小题6】
A.dry B.rich C.clean D.dirty
【小题7】
A.Throw B.Keep C.Try D.Lose
【小题8】
A.like B.sell C.throwD.collect
【小题9】
A.angry B.tired C.moved D.happy
【小题10】
A.that B.if C.though D.what
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Except for a few times, Americans are not big present-givers. There's no exchange of presents among business people, and if one American tries to give another a present, it may look like that he wants to bribe (贿赂) him. Americans have learned that in some other countries people like to give presents to others, but among ourselves we don't see the need for presents.
Even friends may never exchange presents. When I go to foreign countries, I try to bring back little things for close friends, but nobody would feel unhappy if I didn't. I don't often re­member a friend's birthday, and few people outside of my family remember mine. If someone gave me presents too often, I'd get unpleasant. But a present from a foreigner - that kind from his or her homeland — won't go wrong, except to government employees (政府职员) who can't be given presents.
You usually open a present at once and in front of the person who gives it except Christmas and birthday presents. You should only say, "It's so nice. Thanks…" when you get Christ­mas or birthday presents.
You may want to bring a bottle of wine (葡萄酒) or flowers to a dinner party, but you're
never asked to.  Nobody will mind if you bring wine, but your friend may not use it that evening.
At Christmas we often give presents to our family and sometimes our friends. We also give presents to people who have been helpful during the year- doormen, babysitters, housecleaners, newspaper senders— anyone who has often helped us.
【小题1】   What does "close friends" mean in the passage?
A. The friends who are very kind.
B. The friends who live close to each other.
C. The friends who were once classmates.
D. The friends who you like most.
【小题2】  What kind of presents don't Americans usually open in front of the givers?
A.The small presents.B. Christmas or birthday presents.
C. The expensive presents.D. The presents for dinner party.
【小题3】           Why do Americans also give presents to housecleaners at Christmas?
A. To pay them.B. To help them.
C. To thank them.D. To make them work harder.
【小题4】   Which of the following do you think is right?
A. American business people don't want presents because they are rich enough.
B. The writer of this passage must be an American.
C. Everyone must give presents to one's family and friends at Christmas.
D. Government employees can get little presents from a foreigner.
【小题5】   What is the main idea of the passage?
A. Present-giving in the United States.
B. Customs (习俗) in the United States.
C. American people and present-giving.
D. When and how to give presents.
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Tourism(旅游业)wasn't as important as it is today. In the past, only people with a good deal of money could travel on holidays to other countries. More people travel today than in the past because there is a growing middle class in many parts of the world. That is to say, people now have more money for travelling. Special airplane fares for tourists make travel less expensive and more attractive(吸引人的)than ever before.
Different people have different reasons for travelling. But most people enjoy seeing countries that are different from their own. They also like to meet new people and enjoy new food.
Tourism has many changes in a country and in people's lives. People build new hotels and restaurants and train local men and women as guides to show visitors interesting places.
【小题1】What makes travel more attractive than before?
A.Modern telegraph (电报)lines make travel less expensive.
B.Travelling by air to other countries is much cheaper today.
C.More guides are being trained to show beautiful spots.
D.New hotels and restaurants have been built.
【小题2】Many more people travel today than in the past because ______.
A.travelling today is easier than in the past
B.people now have spare money for travel
C.great changes have taken place in the world
D.people have become more interested in travelling
【小题3】People make journeys to many parts of the world. This is because ______.
A.they want to make a study of geography
B.they want to spend money.
C.they want to meet different people and have new food
D.they don't want to do anything else except that they visit friends
【小题4】 Which of the following is TRUE according to the article?
A.People have some trouble in making journeys.
B.With the development of tourism, great changes will take place in many parts of the world.
C.Tourism won't bring any changes in people's minds.
D.Tourism causes only some changes in clothing.
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