—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?—________ my students have a try?
#62321
A
May
B
Must
C
Will
D
Shall
推荐题目
—Can we leave the classroom now?—No, you _________. You _________ to leave until the bell rings.
#74081
A
don’t have to; are supposed
B
mustn’t; are allowed
C
needn’t; aren’t allowed
D
can’t; aren’t supposed
—Tom is in low spirits today. He ______ again in the job interview.—What a pity! He has been greeted with bad luck these days.
#62569
A
could fail
B
may fail
C
must have failed
D
must fail
Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerous.
#74948
A
mustn’t
B
ought not to
C
needn’t
D
don’t have to
— Must I stay here with you?— No, you . You may go home, but you go to the net bar (网吧).
#74128
A
mustn’t；don’t have to
B
needn’t；mustn’t
C
must；need
D
need；must