Of all living creatures on earth, insects are the most plentiful. Some　 36　 are very useful to man, for example, bees,　 37　 we get honey and wax, and silkworms, which　 38　 us with silk. Other varieties,　 39　 , are extremely harmful, and do a great　 40　 of damage, especially to crops. Locusts （蝗虫） are perhaps the most dangerous of all,　 41　 they will eat almost any green　 42　 , and when millions of them　 43　 on cultivated land（耕地）they soon leave it　 44　 . In some countries they are the farmer’s　 45　 enemy. Another nuisance is the common　 46　 , not only because it　 47　 us indoors and out - of- doors, but because it spreads diseases.

　　Scientists have given much time and　 48　 to the study of insects. It needs the most careful and　 49　 observation. Thanks　 50　 their discoveries we now know almost all　 51　 is to be known about the habits of these hardworking insects, bees and ants, which live in　 52　 better planned in some ways than our　　53　 . But the most valuable work has been done in trying to give　 54　 to men, animals and crops from the　 55　 which insects cause.

　　36．A. members  B. forms  C. qualities  D. varieties

　　37．A. by which  B. from which  C. of which  D. in which

　　38．A. give  B. produce  C. offer  D. supply

　　39．A. however  B. meanwhile C. therefore  D. what's more

　　40．A. majority  B. number  C. amount  D. quantity

　　41．A. and  B. for  C. if  D. when

　　42．A. grass  B. field  C. fruit  D. plant

　　43．A. settle  B. attack  C. pass  D. cross

　　44．A. bare  B. nothing  C. empty  D. untouched

　　45．A. hardest  B. greatest  C. serious  D. wildest

　　46．A. insect  B. creature  C. fly  D. enemy

　　47．A. dislikes  B. bites  C. worries  D. hates

　　48．A. understanding  B. ideas  C. comprehension  D. thought

　　49．A. serious  B. patient  C. curious  D. long

　　50．A. for  B. of  C. to  D. with

　　51．A. that  B. which  C. there  D. what

　　52．A. societies  B. crowds C. teams  D. organizations

　　53．A. world  B. nation  C. selves  D. own

　　54．A. help  B. protection  C. living  D. defense

　　55．A. injury  B. wound  C. sickness  D. ruin

    The dresses in this company are available in a great _____ of sizes and styles.

　A new study warns that about thirty percent of the world people may not have enough water by the year 2025. A private American organization called Population Action International did the new study. It says more than three hundred and thirty-five million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

　　PAI researchers Robert Engel says by the year 2025,about three thousand million people lack water. At least 18 more countries are, expected to have serious water problems. The demand for water keeps increasing. Yet the amount of water on the earth stays the same.

　　Mr. Engel says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will increase.

　　The report says lack of water in the future may result in several problems. It may increase health problem. Lack of water often means drinking water is not safe. Mr. Engel says there are problems all over the world be cause of diseases such as cholera（霍乱）that is carried in water.

　　Lack of water also results in more international conflict（冲突）. Countries may have to fight for water in the future. Some countries now get sixty percent of their water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability to improve their economics. This is because new in dustries often need large amounts of water when they are beginning.

　　The Population Action International study gives several solutions（解决方法）to the problem, One way, it says. is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third is to use less water for agriculture.

　　The report also says long-term solution to the water problem must in clued controls on population growth.

　　1．According to the report, how many countries will lack water by the year 2025?

　　　　A. 18.　　　　　　　　　　　　　　B. 28.

　　　　C. 46.　　　　　　　　　　　　　　D. At least 46.

　　2．Which of the following is not true according to the passage?

　　　　A. The amount of the water on earth will always stay the same.

　　　　B. The report gives three solutions to the water problem.

　　　　C. Most of the countries that lack water belong to the developing countries.

　　　　D. There's only one long-term solution to solve the water problem.

　　3．Which of the following is not mentioned in the passage?

　　　　A. The polluted water may carry diseases.

　　　　B. Some countries may fight with each other for water.

　　　　C. The developed countries don't lack water now.

　　　　D. Industries need a lot of water.

　　4．What is the main idea of this passage?

　　　　A. Water shortage is quite serious in the world nowadays.

　　　　B. PAI did a lot of study about water shortage.

　　　　C. Controlling pollution is the best way to solve the problem of water shortage.

　　　　D. Water shortage will be a serious problem facing us in the near future.