—Someone is knocking at the door. Who ______ it be? —It ______ be Tom. He is still in the schoo.
—Someoneisknockingatthedoor.Who______itbe?—It______beTom.Heisstillintheschool.A.may;c...
—Someone is knocking at the door. Who ______ it be? —It ______ be Tom. He is still in the school. A.may; can’t B.can; mustn’t C.might; couldn’t D.could; may not
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