摘要：The boy was observed basketball at eight o’clock yesterday. A. playing B. play C. to play D. having played
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The boy was observed __________ basketball at eight o’clock yesterday.
A. playing B. play C. to play D. having played
查看习题详情和答案>>The boy was observed __________ basketball at eight o’clock yesterday.
A. playing B. play C. to play D. having played
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