请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang

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请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang

请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang
请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang

请问Jane likes singing.She is often heard _______ after class. A.singing B.to sing C.sings D.sang
B hear sb do sth .sb is heard to do sth感官动词变为被动语态要加to

A
heard sb doing sth

答案是A,