Many people watched the boys ______the mountain at that time.
Many people watched the boys ______the mountain at that time.
A、climb
B、climbing
C、to climb
D、climbed
【正确答案】:B
【题目解析】:辨析:1.watch sb do sth表示看到某人做某事,多用于经常性发生的事情或动作。(一般在句子中会有提示经常性动作的时间词语,例如often,always,usually等等)2.watch sb doing sth强调看到某人正在做某事,或者强调动作正在进行。题目中 at that time 在那时,表示的是进行时,因此选B, watch sb doing sth
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