Today is Tuesday. We are having a ___31___ class in the classroom. Ms Chen is telling us what water is like. After that, she asks us “___32_ water like?” No one speaks for __33__ minutes. Ms Chen asks again,“Why don’t you __34__ my question? Don’t I tell you what water is like?”
A boy names Zhang Hui puts up his ___35__ and says,“Ms Chen, you tell us that water has no color __36__ no smell. But ___37_ can we find that kind of water? The __38__ in the river behind my house is always black and it has bad smell. ”Most of us ___39__ with him.
“I am sorry, children,” says Ms Chen. “Our water is getting__40__. That’s a problem.”

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限填一词。

      Many people say dolphins are very intelligent (聪颖的). They seem to be able to think, understand, and learn things quickly. But are they c   1.    like humans or more like cats or dogs? Scientists say dolphin intelligence is s   2.    to human intelligence in some ways. How?

      Like humans, every dolphin has a “name”. I   3.     is a special whistle (哨声). Scientists think dolphins, like people. “t   4.   ” to each other about a lot of things, such as their age, their feelings, or finding food. And, like humans, dolphins use a system (系统) of sounds and body language to c   5.   . But understanding their conversations is not easy for humans. No one “speaks dolphin” yet, but some scientists are trying to learn.

      Dolphins are also social animals. They live in groups, and they often come to play games from different groups and have f  6.    , just like people. In fact, playing t  7.    is something only intelligent animals do.

      Dolphins and humans b   8.     make plans to get something they want. In the seas of southern Brazil, dolphins use an interesting way to get food. When fish are n   9.    a boat, dolphins signal (发信号) to the fishermen to put their nets (网) in the water. And the men can catch a lot of fish. What is the advantage for the dolphins? Why do they h   10.    the men? The dolphins can get some of the fish.

Most people in the U.S. speak only one language, English. They do not learn to speak a second language. Languages are taught in high schools, but very few students learn to speak well. Why don't Americans speak other languages?

First, most Americans never travel to other countries. The United States is a very large country. Americans can travel a long distance and don’t leave the United States. They do not need to learn a second language.

Second, one of the countries next to the United States is Canada. Most people in Canada speak English. Some Americans live near Canada. They travel there often. But they do not have to learn a new language.

Third, many people in other parts of the world speak English. If Americans travel to other countries, they can speak English there, too.

Some Americans think that it is a mistake to speak only English. They believe it is very important to learn a second language. Maybe someday other Americans will agree. Then more people will speak a second language in the United States.

根据短文，将右栏内容与左栏搭配完成句子，并将字母编号填入题前括号内。

（   ）1. The mother language in the U.S.               A. almost everywhere in the world.

（   ）2. Most Americans                                        B. it’s necessary to learn a second

（   ）3. Languages are taught in high schools, language.

（   ）4. Americans can speak English                      C. but very few students learn to

（   ）5. Some Americans think that speak well.        D. is English.

                                                                               E. like to travel in their own country.

根据短文内容，选择最佳答案。

（   ）6. Most Americans never learn to speak __________.

       A. English                                  B. to people in other countries

       C. fluently (流利地)                    D. a second language

（   ）7. Most Americans speak only English because __________.

       A. they can't learn other languages

       B. they never travel to other countries

       C. other languages are not important for them

       D. they don't have language classes in school

（   ）8. In other parts of the world,  __________.

       A. everyone speaks English          B. no one speaks English

       C. many people speak English      D. everyone speaks a second language

（   ）9. Some Americans think it is a mistake to __________.

       A. learn other languages              B. speak only English

       C. travel to other countries          D. go to school

（   ）10. We can know from the passage that most people in Canada__________.

       A. never travel to other countries as Americans

       B. speak only English, too

       C. also speak English

       D. do not like to learn a second language

 The classroom is very ________. No one speaks.
        A.  dirty    B.quiet     C. lazy        D.clean