Test Two

　　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.Then12do 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 mans 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 the20, 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

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