The boy was observed basketball at eight o’clock yesterday. A. playingB. playC. to playD.

发布时间：2020-08-16 08:57:42


The boy was observed      basketball at eight o’clock yesterday.
A. playing
B. play
C. to play
D. having played

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(答案→)A. playing
B. play
C. to play
D. having played
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