Tom was absent from school today. We guess he.A. must have oversleptB. could have been ove

问题补充：

Tom was absent from school today. We guess he.

A. must have overslept

B. could have been overslept

C. should have overslept

D. ought not to have overslept

答案：

(答案→)A. must have overslept

B. could have been overslept

C. should have overslept

D. ought not to have overslept

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