問題詳情

 21-25題爲題組
There are more ants than any other kind of land animals on earth. A million ants can live in a few trees, and there may be a quarter of million in one colony. The total weight of all the ants is far greater than 21 of all the human beings. We humans are extremely interested in the study of ants. The more we study them, the more they seem to be like us.
Ants live in societies in which they depend on one another. The societies are not all 22 the same. There are differences because there are ants of many kinds—more than 1,500 kinds. But 23 each kind has three main types: queens, males and workers.
The queen has wings for a time and one day she flies away with a winged male. The male dies soon afterwards，but the queen without wings finds a good place for her new nest and starts to lay eggs there. Worker ants will feed her and protect the eggs and they will build as big and safe a home as they can.
The ants have a good number of enemies, 24 birds, bears and ant-eaters of various kinds. In some cases other ants are their worst enemies，just as man’s worst enemy is man. In some parts of the world, red ants march in large armies to 25 the homes of black ants. When fighting finishes, the red ants try to take baby black ants, keep them until they grow up, and then use them as workers.

21.
(A) it
(B) that
(C) those
(D) which

參考答案

答案：B
難度：適中0.5
統計：A(1),B(6),C(3),D(2),E(0)

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