1. Could I borrow your dictionary?Yes, of course you _.A.couldB.willC.canD.might2. Difficulties always go with me!Cheer up! If God closes a door in front of you,there _be a window opened for you.A.wouldB.mustC.couldD.can3. 一Look! The man at the gate _ be our headmaster. He is standing there every morning.No, it_be him. He is holding a meeting in the office now.A.must; cantB.must; mustnt C.cant; cantD.cant; mustnt
