题目内容

The old man knows the number of the birds here by ________ once a year.

A.doing a bird count B.feeding them every day

C.watching them D.teaching them to speak

A

【解析】

试题分析:句意:这个老人通过每年数鸟的数量来知道鸟的多少。A.doing a bird count 数数; B.feeding them every day[来每每天喂它们;C.watching them观看它们;D.teaching them to speak教它们说话。结合句意,故选A

考点:考查非谓语动词的用法。

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