阅读下面短文并根据短文内容，从短文后面每题所给的选项中选择最佳答案。

　　My uncle lives in New York City. He likes fishing. Every summer he goes fishing in the Adirondack Mountains.

　　One day this summer he took me to one of the beautiful lakes here. The sun was shining in the blue sky over the lake. My uncle caught some big fish, but I could not catch any. He said, “When I was a child, I caught a lot of fish here. But now there aren't many fish. In some of the lakes there are no fish at all.”

　　Then one day I read an article about acid(酸的) rain in a magazine. I learned many things. Gases(废气) from factories and cars go up into the sky, and the wind carries them far away. Later they come down with the rain in other places. That a acid rain.

　　Fish eggs and young fish are killed by even a little acid in the water. Today there are no fish in about 200 lakes in the Adirondack Mountains.

　　Acid rain is becoming a big problem all over the world today. Canada and some countries in northern Europe have the same problems. In Canada, for example, a lot of trees are dying(枯死) because of acid rain.

　　At the end of the article the writer says, “When I stand here and look at these lakes after ten years, what will I see and hear? Will fish jump again? Will birds sing their happy songs? Or will it be a silent spring?”

　　What should we do to stop acid rain? Is it too late now? No, I do not think so. All of us should work together to stop acid rain.

1．There are no fish in many lakes because of ________.

[　　]

2．The writer knows why fish eggs and young fish are killed with the help of ________.

[　　]

3．Choose the right order to tell us how fish are killed.

a．Gases go up into the sky.

b．Acid rain falls into the river.

c．Fishes die in the river.

d．Gases come from factories.

e．The wind carries gases far away.

[　　]

4．Which of the following is true?

[　　]

A．It's too late to stop acid rain.

B．All the fish will die in ten years.

C．Acid rain helps trees to grow.

D．Acid rain can also kill a lot of trees.

根据句子意思，用括号内所给词的正确形式填空

1．She often makes mistakes．She is a __________ （care） girl．

2．I won't leave until all the work is __________ （complete）．

3．They'll be useful，especially if you get__________ （lose）．

4．For __________（far） information，please contact Amy．

5．"Will it be a success?" I kept asking __________ ．（I）．

6．Amy came first in the race．She ran the __________ （fast） of all．

Dear Kitty，

I am sorry that I did not write ___1__ you earlier because T have been very busy．I was helping ___2__ a charity show to raise money for Project Green Hope．A lot of work needed to be finished．so I did not have ___3__ free time．

I felt very happy when I ___4__ to be the host．It was ___5__，but I was also very nervous ___6__ the TV cameras．I knew that lots of people would watch the show and that many famous ___7__ would come too．

We started working on the show ___8__ ago，so we could do everything on time．1t was my job to introduce each star．I also had many other duties．It was hard work but I was ___9__ to do it．

We practised a lot ___10__ the show．I had to remember to look at the right camera at the right time．___11__，I thought l would never be able to remember all the words and do everything right at the same time．Slowly，everything became ___12__．

The big day came very quickly，and suddenly it was the night before the charity show．I couldn't ___13__ at all that night because l was so excited．‘Will it be a ___14__?’ I kept ___15__ myself．

Twenty minutes before the big event，the doors opened and many people came into ___16__．‘No time to be nervous any more．This is it，’ I told myself．A lot of people came to watch the show．The fans of the pop stars were making a lot of noise，so I __17__ speak loudly．

Everything seemed to happen so fast，and now it is all over．A lot of money has been donated to Project-Green Hope．Everyone was very ___18__ and we had a lot of support from local businesses．I hope more events like this ___19__ to raise money for charity and I think more people should be invited ___20_ part in them．

I hope to see you soon．

Best wishes

Ricky

1．A．to                         B．for                      C．before                    D．at

2．A．of                         B．in                        C．with                             D．after

3．A．many                    B．much                   C．few                       D．a few

4．A．choose                         B．was chosen          C．chosen                   D．choosing

5．A．frightened              B．frightening           C．excited                   D．exciting

6．A．because                 B．because of                  C．instead of             D．instead

7．A．pop teachers            B．pop scientists         C．pop doctors            D．pop stars

8．A．two minutes            B．half an hour          C．two months            D．two seconds

9．A．sad                       B．energetic              C．angry                     D．happy

10．A．after                    B．behind                 C．before                    D．in front of

11．A．In the beginning      B．In the end            C．In the middle of      D．At last

12．A．easy                    B．easier                   C．easiest                   D．more easy

13．A．sleep                                                      B．eat

C．drink                                                        D．have a good time

14．A．successful                  B．succeed               C．Success                       D．successfully

15．A．ask                      B．to ask                  C．asks                             D．asking

16．A．the theatre            B．the factory                  C．the classroom         D．the library

17．A．have to                B．has to                  C．had to                    D．must

18．A．selfish                 B．generous                 C．silly                     D．polite

19．A．organize                                                  B．organizes

C．wilt organize                                              D．will be organized

20．A．to take                 B．takes                   C．taking                    D．took

1 

Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!

Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.

Will there be a better indicator than litmus paper? The three kids decided to try and find out!

How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.

The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best color change. They decided it was the litmus paper!

"It's our first scientific journey, Huang said, "But it makes me want to try harder."

1.Whom did the three kids want to challenge?

A. Their chemistry teacher.

B. Their headmaster.

C. Robert Boyle

D. Thomas Edison

2.From the text, a red cabbage is a kind of ____.

A. plant　　B. animal　　C. paper　　D. liquid

3.What is widely used as the acid-base indicator now?

A. red cabbage              B. litmus paper

C. any plant                D. any flower 

4.The story mainly tells us ____.

A. how to make litmus paper

B. about the three kids' spirit

C. scientists were wrong

D. the kids are heroes