Question

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

Answer

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。