阅读短文，根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。
Animals with six legs are called insects. ____ 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. _____
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). ____ 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. But it has two pairs of strong wings
so it can fly very fast. The dragonfly is one of the fastest insects in the world. The dragon fly can see very well.
____ But the life of 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.
