摘要：( ) ---Someone is knocking at the door. Who may it be? ---It be Tom. He is still in the school. A. can’t B. mustn’t C. couldn’t D. may not
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---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
---It ______ be Tom. He is still in the school.
| A．can’t | B．mustn’t | C．couldn’t | D．may not |
—Someone is knocking at the door. Who ______ it be?
—It ______ be Tom. He is still in the school.
—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 |
—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
---Listen! Someone is knocking at the door. Who _____it be?
---It _____be Tom. He phoned to visit me this evening.
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---It _____be Tom. He phoned to visit me this evening.
| A．may; may | B．may; shouldn’t | C．must; can | D．can; may |