Question

I heard Lucy ________ happily in her room when I passed her house.

A．sing

B．to sing

C．singing

D．sings

Answer 1

C

試題分析：句意：我經過Lucy 房間的時候聽見她在房間里唱得很開心。hear 聽見，感官動詞，hear sb. doing sth. 聽見某人正在做某事。由句意可知，我經過房間的時候Lucy 正在唱歌，故選C。