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

I __________ the CDs to you if I have time tomorrow.

A．will return         B．returned          C．have returned      D．return

I can lend you my bike, but you must ________.

完成句子和句型转换（20分，共10小题，每小题2分）
【小题1】你看完这本书后，最好马上还给我。
When you                the book, you’d better return it to me at once.
【小题2】看起来我们班将赢得这场篮球赛。
               that our class will win the basketball game.
【小题3】他三十几岁时成了一名老板。
He became a boss                   thirties.
【小题4】他们是中国的骄傲。
They are the                    China.
【小题5】这音乐听起来像鸟儿在歌唱。
The music                     the singsing of  birds.
【小题6】The film began five minutes ago.(改为同义句)
The film has                      for five minutes.
【小题7】“Are there homeless people in your city?” I asked Wang Tao.(改为同义句)
I asked Wang Tao _____ there _____ homeless people in his city.
【小题8】He’s never been abroad.（改为反意疑问句）
He’s never been abroad,  _____  _____  ?
【小题9】You mustn’t play football in the street.(改为祈使句)
_____  _____ football in the stree
【小题10】He has taught in this school since he was twenty.（对划线部分提问）
_____  _____   has he taught in this school?

Could you       me your bike ?  Mine is broken .