9.情态动词

　　1. A: The two young firefighters fell from the twelfth floor and died.

　　B: It          be a big loss to their families.

　　A) may        B) must        C) need        D) should

　　2.There is plenty of time before the concert starts. We          be in such a hurry.

　　A) can’t       B) mustn’t       C) needn’t      D) oughtn’t

　　3. Ben________ lift the heavy box by himself, so he asked his father for help.

　　A) mustn't              B) needn't          C) couldn't            D) shouldn't

　　4. Mike replied, with a big smile, “Oh, you ______ to worry about them.”

　　A) not to need              B) needn’t            C) not need          D) don’t need

　　5. Jane ______ be in the office. She has gone to the meeting room.

　　A) mustn’t            B) needn’t            C) can’t            D) shouldn’t

　　6. –Must I do the homework in the classroom?

　　–No, you _________. You may do it at home after school.

　　A) needn’t            B) mustn’t            C) can’t                D) shouldn’t

　　7. You ______ make a quick decision right now. You can think of it for a couple of days.

　　A) can’t     B) mustn’t     C) needn’t    D) don’t need