Question

As they were walking around, they noticed a man _______ against a tree. A．sit B．to sit C．s

As they were walking around, they noticed a man _______ against a tree. A．sit B．to sit C．sitting D．sat

Answer 1

C

试题分析:句意：当四下走动的时候，他们注意到一个人在倚着树坐着。此处是非谓语短语做补语，感官动词后不能跟to do做补语，故排除BD选项； Notice sb do sth意思是“看到某人做某事了”表示看到动作的整个过程，而notice sb doing sth 意思是“看到某人在做某事”，表示正在进行的动作，根据句意可知选C。类似动词还有see 、hear、observe等。