—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?
#62920
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.
#75539
A
mustn’t, are allowed
B
don’t have to, are supposed
C
needn’t, aren’t allowed
D
can’t, aren’t supposed
-Must I make the writing plan now? - No, you______. You______ finish it tomorrow.
#74957
A
needn’t, must 
B
don’t have to, may
C
mustn’t, may
D
mustn’t, must
The flowers in my room         every day, or they’ll die.
#75306
A
must water
B
must be watered
C
should water
D
can be watered