--Whatwasshedoing?--Ifoundher_____intheroom.A.sangB.singingC.singsD.tosing
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题目内容：
--What was she doing?--Ifound her _____ in the room.
A.sang B.singing C.sings D.to sing
优质解答
B
to find sb. doing sth.:发现某人正在做某事
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