The girl is often heard in the next room.A. singB. to singC. singingD. sings

发布时间：2020-08-21 07:12:50

The girl is often heard      in the next room.
A. sing
B. to sing
C. singing
D. sings

网友回答

A. sing
(答案→)B. to sing
C. singing
D. sings
解析：hear sb do sth表示听到某人经常做某事，变为被动语态时要把不定式符合to加上，变为be heard to do sth.
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