25、The undersea world is very beautiful． Now more and more people want to dive in the water to find the secrets there．Scuba diving (潜水) is a new sport today． It can take you into a wonderful undersea world．

You will find many strange animals in the sea．Some are as large as a school bus．Many sea animals give out light in the dark and some have sharp teeth．

During the day, there is enough light．Here, under the sea, everything is blue and green．When fishes swim nearby, you can catch them with your hands．When you have bottles of air on your back, you can stay in deep water for a long time．However, you can' t dive too deep．And you must be very careful when you dive in deep water．

The deep sea is not an easy place to live in．It's cold, and it's dark, too．The deeper it is, the less sunlight there is．At about 3,000 feet, there is no light at all．It is very dark in the sea．Many fishes have no eyes．Some have big eyes．A few have eyes on one side．

Besides(除了) the cold and the darkness, deep-sea animals face a third danger—other animals．

Animals eat! They must find food to eat．Many animals eat plants．However, some animals eat meat．This means these sea animals have two big jobs．They need to find animals as food, and they have to try not to become other animals' meal．

1．Why do people want to dive in the sea? Because        ．

A．they want to catch fish

B．they want to find the secrets of the undersea world

C．the sea is deep

D．there are all kinds of plants in the sea

2．In the daytime, when you dive in the sea, you        ．

A．can see everything green and blue                               B．can't be in danger

C．can catch nothing                                                     D．can't see anything

3．How many dangers will animals meet in the deep sea?

A．One．                    B． Two．                  C． Three．                D． Four．

4．When you do scuba driving, you can        ．

A．stay in deep water for a long time

B．dive very, very deep

C．live in deep water easily

D．dive freely without any dangers

5．Which of the following is WRONG?

A．One animal finds something to eat, and it may be eaten by others．

B．At the depth of 3,000 feet under the sea, many animals can find their way by hearing and feeling．

C．The deeper the sea is, the darker and colder it is．

D．At the depth of 3,000 feet under the sea, all animals can find their way by seeing．

22、用括号内所给动词的适当形式填空(必要时加助动词或情态动词)。

Dear Mrs．Jackson，

I(1)______(hope)you and the family are well．I’m writing to you(2)_____(thank) you for the lovely time I had with you in England．Tim and Lucy(3)______(be)so friendly that I never felt lonely．You were very hospitable and made me(4)______(feel)like one of the family．

I(5)______(be)home for three weeks and I am already busy preparing for my school exams．My mother(6)______(have)an operation a week ago and fortunately everything went well．

Have you heard from Jose and Martina? Please(7)______(send)me their addresses because I have lost my address book．I received a letter from Matsuko and a postcard from Hans last Sunday．It was great(8)_______(have)so many friends in London．

    It would be really wonderful if you all can come to China next summer．My parents said they(9)______(love)you to come and stay in our house in the countryside．Then I’d be able to show you the most beautiful sights in Zhengzhou，and you(10)_______(be)amazed by the lovely Chinese food．

                                                   Yours，

                                                          Meimei

20、Mike and Dick work in the same office. They don't like the cold weather. One day they decided to take their holiday in Australia. Their plane arrived in Sydney at nine in the morning . They had a good rest in a hotel.

The next morning they rented a car in the city and began their travel. A few hours later  the sun was shining in the sky and there were no shade trees(遮荫树) beside the road. It was so hot that they could hardly go on driving. They had to stop to look around. Mike found a river about half a kilometer away from them. They were both very happy and drove the car quickly. Soon they got to the river. Before they jumped into the water, Dick saw a boy playing under a big tree. He asked, "Are there any sharks in the river, boy?"

"No, there aren't." answered the boy. So they began to swim in the river. After a while, Dick felt something hit against his leg. He told Mike about it. They were afraid and stopped swimming. Dick asked loudly, "Is it true that there aren't any sharks in the river?  Yes, sir,"   said the boy. "There're a lot of crocodiles (鳄鱼) in the Water. All the sharks have swum away!"

1. The story happened when it was _________in the two men's country.

       A. spring             B. summer         C. autumn           D. winter

2. The two young men went to Australia to________.

       A. swim in the river                      B. study to drive,

       C. make a travel                         D. find some work

3. Mike and Dick couldn't drive any longer because__________.

       A. the sun was shining in the sky          B. there were no shade trees beside the road

       C. the weather was very hot               D. they were too tired

4. Dick became afraid because__________.

       A. he saw a shark in the water

B. he thought it might be a shark that hit against his leg

       C. he saw the boy laughing at them under the big tree

       D. he had been told there were some sharks in the river

5. Having heard the boy, the two young men began to________.

       A. catch the crocodiles in the water    B. look for the crocodiles there

       C. run to beat the Australian boy      D. come out of the river at once

19、American people like to say "Thank you" when others help them or say something kind to them. People of many other countries do so, too. It's a very good habit.

     You should say "Thank you" when someone passes you the salt on the table, or opens the door for you, or says you have done your work well.

    "Thank you" is used not only between friends but also between parents and children, brothers and sisters, husbands and wives.

"Excuse me" is another useful short expression, When you hear someone say it behind you, you know somebody wants to walk past you without touching you.

It's not polite to interrupt (打断) others when they are talking. If you want to speak to one of them, say "Excuse me" first, and then begin talking. You should also do so when you want to make any noise before others,

Let's all learn to say "Thank you" and "Excuse me".

1．__________like to say "Thank you" and "Excuse me".

A. People in many countries            B. Only American people

C. Few people outside China            D. All the people throughout(遍及)the world

2．You should say“Thank you”when_______．

A. you have made a mistake               B. someone opens the door for you

C. you pass the salt to others on the table     D. you want to cough before others

3．If you want to walk past somebody without touching him，you’d better say“_______”first．

A. Hello        B. How do you do        C. Excuse me      D. Don’t move

4．When you hear others say your handwriting is good，you should say“_______”．

A. Excuse me                           B. I’m very sorry

C. How about yours                      D. Thank you

5．Which of the following is true?

A. People say“Thank you”among the members of a family and between friends．

B. We don’t say“Excuse me”only between brothers and sisters．

C. People say“Excuse me”only between brothers and sisters．

D. If you want to make any noise before others you should say“Thank you”．