D
阅读下面短文,从短文后所给的选项中选出能填入短文空白处的最佳选项,使短文通顺连贯,其中有一项是多余选项。
Animals with six legs are called insects. 11 Some insects such as locusts(蝗虫)eat crops. They are not farmers' friends but their enemies. We all know there are other animals that eat insects. Birds eat insects, and fish eat insects, too. 12
But do you know there are some kinds of insects that eat other insects? They are also friends of farmers'. The dragonfly(蜻蜓)is one of them.
Many people are afraid of the dragonfly. But it is a friendly insect. It helps to kill flying insects, especially mosquitoes(蚊子). 13 Some dragonflies eat while flying, but others like to come down to the ground before eating their meal.
The dragonfly can't walk, because all its legs are at the front of its body. 14 The dragonfly is one of the fastest insects in the world. The dragonfly can see very well. 15
But the life of the dragonfly is short. It can't live in the cold weather.
A. A dragonfly may have as many as one hundred mosquitoes in its mouth at a time.
B. There are more insects than any other kind of animals.
C. It can see a moving insect far away.
D. They are farmers' friends.
E. It can fly in the sky.
F. But it has two pairs of strong wings so it can fly very fast.
11. 12. 13. 14. 15.