As they were walking around, they noticed a man _______ against a tree.

A. sit B. to sit C. sitting D. sat

 

C

【解析】

試題分析:句意:當(dāng)四下走動的時候,他們注意到一個人在倚著樹坐著。此處是非謂語短語做補語,感官動詞后不能跟to do做補語,故排除BD選項; Notice sb do sth意思是“看到某人做某事了”表示看到動作的整個過程,而notice sb doing sth 意思是“看到某人在做某事”,表示正在進行的動作,根據(jù)句意可知選C。類似動詞還有see 、hear、observe等。

考點:考查非謂語動詞。

 

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