Birds" singing is sometimes a warning to other birds ______ away.A.to stayB.stay

Birds" singing is sometimes a warning to other birds ______ away.A.to stayB.stay

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Birds" singing is sometimes a warning to other birds ______ away.
A.to stayB.stayingC.stayedD.stayed

答案
A
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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A.being done B.do C.to be done D.to do

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A.to use B.used C.using D.use

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A.startingB.being startedC.to startD.to be started

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A. to followB. followingC. followedD. follows

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