Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．
#63356
A
may
B
will
C
must
D
should
推荐题目
---- It’s the office! So you _____ know eating is not allowed here.---- Oh, sorry.
#62757
A
must
B
will
C
may
D
need
--- The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?---____ my students have a try?
#62974
A
Shall
B
Must
C
Will
D
May
—___________ he have to wear his school uniform every day?—No, he ______________.
#75548
A
Must; mustn't
B
Can; can't
C
Does; doesn't have to
D
Do; don't have
—How much shall I pay for the telephone call? —You _____. It's free.
#76026
A
mustn't
B
shouldn't
C
don't have to
D
can't
---Be quiet! Mr Smith is coming. --- Don’t worry. It__________be him. Mr Smith is much taller.
#74432
A
mustn’t
B
must
C
can’t
D
needn’t