—________ you open the window, please? —Yes, I can.
#78146
A
May
B
Need
C
Must
D
Can
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Tommy, you____ be hooked on the Internet all day. You may fall behind others in study.
#63526
A
mustn’t
B
shan’t
C
can’t
D
needn’t
—He ____be in the classroom, I think.—No, he_____ be in the classroom. I saw him go home a minute ago.
#74430
A
can, may not
B
must, may not
C
may, can’t
D
may, mustn’t
My sister met him at the Grand Theater yesterday afternoon, so he _______ your lecture.
#63463
A
couldn’t have attended
B
needn’t have attended
C
mustn’t have attended
D
shouldn’t have attended
— Guess what! I have won the first prize in the speaking competition. — Congratulations! You _____ put a lot of work into it.
#62583
A
should
B
must
C
should have
D
must have
Even a drop of water ______because it is so important to all the living things.
#76903
A
must waste
B
must be wasted
C
mustn’t waste
D
mustn’t be wasted