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Jimmyisanactiveboy,heisalwaysseen___ontheschoolplaygroundafterschool.请问选哪个?(A)playfootball(B)playingfootball(C)toplayfootball(D).toplayingfootball
题目内容：
Jimmy is an active boy,he is always seen___ on the school playground after school.请问选哪个?
(A)play football (B)playing football (C)to playfootball (D).to playing football优质解答
C 被动还原to,由often确定主补格式
(A)play football (B)playing football (C)to playfootball (D).to playing football
优质解答
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