Birds' singing is sometimes a warning to other birds away.A. to stayB. stayingC. stayedD.

发布时间：2020-08-16 21:21:14

Birds' singing is sometimes a warning to other birds      away.
A. to stay
B. staying
C. stayed
D. stayed

网友回答

(答案→)A. to stay
B. staying
C. stayed
D. stayed
解析：考察非谓语动词。本题考查非谓语动词做目的状语的情况，空格置于句中，主谓与to do之间无逗号间隔，译为“为了”。句意：鸟叫有时是为了警告其他的鸟远离他们。
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