问题
选择题
Anna is often heard ______songs in her room.
A．sung
B．singing
C．sing
D．to sing
答案
答案：D
考查非谓语动词。句中考查hear sb do sth听到某人做某事，结构为省to的不定式，其被动应当加上to。句意：常听到安娜在她房间里唱歌。
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Anna is often heard ______songs in her room.
A．sung
B．singing
C．sing
D．to sing
答案：D
考查非谓语动词。句中考查hear sb do sth听到某人做某事，结构为省to的不定式，其被动应当加上to。句意：常听到安娜在她房间里唱歌。
