Question

【题目】Mary loves singing so much. She ________ after school very often.
A.is heard sing
B.is heard to sing
C.hears sing
D.hears sing

Answer 1

【答案】B
【解析】句意：玛丽非常喜欢唱歌，经常听见她在放学后唱歌。短语hear sb do sth听见某人做某事，这里sb作主语，变成被动句，sb be heard to do .某人被听见做了某事。故选B。