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Thegirlwasoftenheardhappilyinherroom.A.singB.tosingC.singingD.sings

题目详情
The girl was often heard _________ happily in her room.
A.sing B.to sing C.singing D.sings
▼优质解答
答案和解析
hear sb doing sth
这是固定搭配,而该题是被动语态,可以被改写为sb.often heard the girl singing happily in her room.所以选C