In the 13th century, Marco Polo travelled a long way to China. He was a famous Italian 31 During his stay in China, he saw many wonderful things. One of the things he 32 was that the Chinese used paper money. People in 33 coun­tries didn't use paper money until the 17th century. However,people in China began to use paper money in the 10th century. 34     was invented by a Chinese about 2 000 years ago. His name was Cai Lun. He then  35 these pieces of paper together and made them into a 36 .

Now paper mainly comes from trees. We use it every day. 37 we waste a lot of it. If we keep on doing so, people 38 cut down many more trees. Then there will not be any trees left. If there are no 39 , there will be no paper.

So how can we 40 paper? When we mak­ing notes,we can use 41 sides of each piece of paper. We  can  buy  drinks  in bottles instead of 42  in paper packets. We can also use cotton handkerchiefs ( ??????) and not the paper ones.

43  we go shopping, we can use fewer paper bags. If the salesman gives us a paper bag, we can keep it and  44  it later. We can help to protect trees if we think 45 . We should to it now,before it is too late.

1. A. traveller       B. actor         C. doctor       D. driver

2. A. disliked        B. disagreed        C. invented     D. discovered

3. A. Eastern        B. Western         C. Southern     D. Northern

4. A. Iron           B. Paper           C. Television    D. Silk

5. A. collected       B. divided         C. moved       D. put

6. A. magazine       B. newspaper      C. book         D. dictionary

7. A. Sometime       B. Some time      C. Sometimes    D. Some times

8. A. have to         B. mustn't         C. used to       D. shouldn't

9. A. books          B. trees           C, leaves        D. factories

10. A. make          B. use C.save       D. buy

11. A. all            B. each            C. every        D. both

12. A. them          B. those           C. these        D. ones

13. A. Before         B. After           C. As soon as    D. When

14. A. repair          B. record         C. reuse         D. return

15. A. carefully        B. badly          C. quickly      D. freely

In the 13th century, Marco Polo travelled a long way to China. He was a famous Italian 31 During his stay in China, he saw many wonderful things. One of the things he 32 was that the Chinese used paper money. People in 33 coun­tries didn't use paper money until the 17th century. However,people in China began to use paper money in the 10th century. 34     was invented by a Chinese about 2 000 years ago. His name was Cai Lun. He then 35 these pieces of paper together and made them into a 36 .

Now paper mainly comes from trees. We use it every day. 37 we waste a lot of it. If we keep on doing so, people 38 cut down many more trees. Then there will not be any trees left. If there are no 39 , there will be no paper.

So how can we 40 paper? When we mak­ing notes,we can use 41 sides of each piece of paper. We  can  buy  drinks  in bottles instead of 42  in paper packets. We can also use cotton handkerchiefs ( 棉手帕) and not the paper ones.

43  we go shopping, we can use fewer paper bags. If the salesman gives us a paper bag, we can keep it and 44  it later. We can help to protect trees if we think 45 . We should to it now,before it is too late.

9. A. books         B. trees          C, leaves        D. factories

Food is very important. Everyone needs to   36  well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is   37  . We begin to get knowledge(知識) even when we are very young. Small children are  38  in everything around them. They learn  39   when they are watching and listening. When they are getting older, they begin to 40  story books, science books and anything they like. When they find something new, they love to ask questions and __41  to find out the answers.
What is the best  42  to get knowledge? If we learn by ourselves（自學(xué)）, we will__43 _the most knowledge. If we are  44  getting answers from others and do not ask why, we will not learn well. When we study in the right way, we will learn __45  and understand better.

Food is very important. Everyone needs to   36  well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is   37  . We begin to get knowledge(知識) even when we are very young. Small children are  38  in everything around them. They learn  39   when they are watching and listening. When they are getting older, they begin to 40  story books, science books and anything they like. When they find something new, they love to ask questions and __41  to find out the answers.

What is the best  42  to get knowledge? If we learn by ourselves（自學(xué)）, we will__43 _the most knowledge. If we are  44  getting answers from others and do not ask why, we will not learn well. When we study in the right way, we will learn __45  and understand better.