Tom was absent from school today. We guess he.A．must have oversleptB．could have been oversleptC．should have oversleptD．ought not to have overslept-高中英语-n多题

◎ 题干

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

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