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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1808

---- Where is Jack?
----He _________ football on the playground with those AFS students, but I am not sure.

A.must be playing B.must have played
C.may be playing D.may have played
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WhereisJack?Hefootballonthepla