试题题干
Translate the following sentence into Chinese.
Men utilize this homing instinct to send messages on small pieces of paper which are fastened to the pigeons’ backs or legs.
参考答案
试题解析
考点：utilize利用； instinct本能； small pieces of paper小纸片；be fastened to被绑在······。
句子结构：句子主干为Men utilize this homing instinct，动词不定式作目的状语。