Question

【题目】The boy is often heard _________ in the music room. He sings very well.

A. practise singing B. to practise singing C. practised singing

Answer 1

【答案】B

【解析】试题分析：考查被动语态的中的非谓语动词用法。在主动句中：hear sb do sth;听见某人做过某事。

在被动句中：sb be heard to do sth:某人被听见做过某事。故选B