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

Of all living creatures on earth, insects are the most plentiful. Some 1 are very useful to man, for example, bees, 2 we get honey and wax, and silkworms, which 3 us with silk. Other varieties, 4 , are extremely harmful, and do a great 5 of damage, especially to crops. Locusts are perhaps the most dangerous of all, 6 they will eat almost any green 7 , and when millions of them 8 on cultivated land they soon leave it 9 . In some countries they are the farmers’ 10 enemy. Another nuisance is the common 11 , not only because it 12 us indoors and out-of-doors, but because it spreads diseases.

　　Scientists have given much time and 13 to the study of insects. It needs the most careful and 14 observation. Thanks 15 their discoveries we now know almost all 16 is to be known about the habits of these hardworking insects, bees and ants, which live in 17 better planned in some ways than our 18 . But the most valuable work has been done in trying to give 19 to men, animals and crops from the 20 which insects cause.

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

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

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

4．A．however              B．meanwhile      C．offer              D．supply

5．A．majority              B．number         C．amount            D．what’s more

6．A．and                  B．for             C．if                 D．when

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

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

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

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

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

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

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

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

15．A．for                 B．of             C．to                 D．with

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

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

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

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

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

Empty Deserts

    In the 19^th century Americans from the eastern states moved out west to settle in the rich new lands along the Pacific coast. The most difficult part of their trip was crossing the “Great American Desert in the western part of the United States by horse and wagon.

The western desert can be very dangerous. There is little water and there are few trees. But the desert also has scenery of great beauty. Tall towers of red and yellow stone rise sharply from the flat sandy valley floor. The scene has been photographed many times and appears in movies and in TV.

    In Arizona, man made dams across the Colorado River have made two large lakes in the middle of the dry desert country. At Lake Powell, the red stone arch of Rainbow Bridge rises high above the blue lake.

    There are few roads. Many areas of Lake Powell’s shore can only be reached by boat or on foot. But hikers in this empty desert land sometimes find very old native American pictures, painted on the rocks.

    In Death Valley, California, the summer temperature rises to 130 degrees. There is less than two inches of rain each year. Death Valley is the lowest place in America---- 925 meters below sea level. In the 1800s, many travelers died when they tried to cross this waterless valley in the terrible heat.

    Although the desert is dry and seems empty, there is plenty of life if you look closely. Small insects, snakes and rats have learned how to live in the desert heat. They live under ground and come out at night, when it is cool. Plants such as cacti need very little water.  When it does rain in the desert (sometimes only once or twice a year), plants grow quickly, and flowers open in a single day. For a short time, the desert is covered with brilliant colors.

In the 19^th century, Americans moved from the east to the west because they ______.

A. enjoy the trip                    B. wanted to make their home there

C. wanted to find new grassland there   D. had no water to drink

From the passage, we can conclude that ______.

the western desert is a good place for people to live in

there is little water but there are many trees in the desert

the desert is dangerous but it is full of life

till now, people know little about the desert

If you want to find some old native American pictures painted on the rock you must go ______.

A. on foot    B. by boat    C. by car    D. by plane

In the 1800s many travelers died in Death Valley because of ______.

A. illness                         B. high temperature   

C. cold weather                   D. poisonous water

In the desert, animals will die ______.

A. if they move about      B. if they cannot make holes underground

C. if they come out at night  D. if they drink much water

_______empty wine bottles stood on the back porch.

A. A kind of       B. A type of          C. A collection of    D. The number of

Empty Deserts
In the 19^th century Americans from the eastern states moved out west to settle in the rich new lands along the Pacific coast. The most difficult part of their trip was crossing the “Great American Desert in the western part of the United States by horse and wagon.
The western desert can be very dangerous. There is little water and there are few trees. But the desert also has scenery of great beauty. Tall towers of red and yellow stone rise sharply from the flat sandy valley floor. The scene has been photographed many times and appears in movies and in TV.
In Arizona, man made dams across the Colorado River have made two large lakes in the middle of the dry desert country. At Lake Powell, the red stone arch of Rainbow Bridge rises high above the blue lake.
There are few roads. Many areas of Lake Powell’s shore can only be reached by boat or on foot. But hikers in this empty desert land sometimes find very old native American pictures, painted on the rocks.
In Death Valley, California, the summer temperature rises to 130 degrees. There is less than two inches of rain each year. Death Valley is the lowest place in America---- 925 meters below sea level. In the 1800s, many travelers died when they tried to cross this waterless valley in the terrible heat.
Although the desert is dry and seems empty, there is plenty of life if you look closely. Small insects, snakes and rats have learned how to live in the desert heat. They live under ground and come out at night, when it is cool. Plants such as cacti need very little water.  When it does rain in the desert (sometimes only once or twice a year), plants grow quickly, and flowers open in a single day. For a short time, the desert is covered with brilliant colors.
【小题1】In the 19^th century, Americans moved from the east to the west because they ______.