Unit 5
Nobody likes insects. They are 1 and sometimes dangerous. Some of them bite us and give us 2 ; others bite us and give us big red 3 . Some do not bite, 4 they just fly round our heads or crawl round our houses and gardens. And we do not like any of them — 5 those lovely butterflies.
But insects are interesting. First, they are very 6 animals. Three hundred and twenty million years ago there were no men or other 7 in the world but there were insects. Today, 8 every square mile of land there are millions of them flying and crawling 9 . Second, insects are very 10 to their habitat, to their food and to the weather. Now there are about a million different 11 in the world. Then 12 do people use insecticides?
Not many insects 13 us. In many cases we do not see the insects and we do not think much about them. The 14 is that insects eat so much of man’s food, 15 there are so many billions of them. So we must use insecticides to 16 them.
An insecticide is simply a special chemical 17 with some poisonous elements. Farmers 18 their crops very often and the insects die quickly. Of course some poisonous chemicals 19 on the crops or in the 20 , and that is also dangerous to our health.
1. A) wicked B) shocked C) troubling D) annoying
2. A) wounds B) diseases C) hurts D) cuts
3. A) places B) points C) spots D) scraps
4. A) and B) but C) or D) because
5. A) besides B) let alone C) except for D)except
6. A) old B) young C) small D) weak
7. A) mammals B) cats C) reptiles D) birds
8. A) on B) with C) throughout D) in
9. A) over B) above C) about D) up
10. A) suitable B) adaptable C) agreeable D) changeable
11. A) species B) samples C) models D) examples
12. A) when B) how C) where D) why
13. A) stab B) wound C) hurt D) pin
14. A) difference B) condition C) method D) reason
15. A) so that B) due to C) and D) owing to
16. A) put an end to B) get rid of C) take care of D) get hold of
17. A) medicine B) sections C) compound D) material
18. A) spray B) cover C) clean D) splash
19. A) drop B) stay C) disappear D) leave
20. A) soil B) dirt C) earth D) mud
Unit 6
A good deal of research is being 1 out nowadays 2 the causes of juvenile crime. It is obvious 3 one of these is an unsatisfactory home background. The father or even 4 both parents may be involved 5 some of form of criminal activity and the growing child 6 conflict with the authorities for granted. The parents may be 7 hard terms with each other or even separated and the child is subjected 8 constant emotional strain which may make him readily seek some kind of outlet in violence and serious crime.
9 cause of teenage crime may be boredom of discontent. 10 the boy of low intelligence who scarcely knows 11 to read there is the better educated but spoilt middle-class youth who 12 his parents as outdated humbugs(欺騙). The police 13 considered to be domineering bullies 14 purpose and delight is to suppress ruthlessly all who challenge the meaningless beliefs of 15 society. Some of these youngsters pride themselves 16 being rebels or revolutionaries, 17 others find a certain fulfillment in 18 banks and shops, taking 19 in gang warfare or even beating up harmless individuals whom, for some reason or 20 , they happen to take a dislike to.
1. A) run B) gone C) set D) carried
2. A) in B) for C) into D) on
3. A) with B)that C) why D) how
4. A) possibly B) so C) though D) improbably
5. A) by B) in C) into D) with
6. A) makes B) takes C) thinks D) recognizes
7. A) in B) with C) on D) got in
8. A) toward B) about C) to D) by
9. A) Other B) some C) Another D) One another
10. A) Beside B) In addition C) But for D) Besides
11. A) when B) how C) where D) whether
12. A) considers B) regards C) takes D) holds
13. A) would be B) might be C) are D) is
14. A) whose B) their C) of which D) with which
15. A) contemporary B) ancient C) historic D) historical
16. A) on B) in C) at D) about
17. A) when B) consequently C) therefore D) while
18. A) dropping B) breaking C) robbing D) fighting
19. A) interest B) pride C) place D) part
20. A) else B) another C) other D) others
