If you _____ smoke, please go outside because this is a non-smoking office.
#63602
A
must
B
should
C
can
D
may
推荐题目
She is a quiet girl at school，but sometimes she _____ be very naughty.
#62247
A
should
B
would
C
will
D
can
— Can you play the guitar?— No. I _ ___ . I can play the violin.
#74834
A
needn't
B
may not
C
can't
D
mustn't
---Are you going to see the film with us?--- I’m not sure. I go to the concert instead.
#63564
A
must
B
would
C
should
D
might
—Mum, I watch TV now ? —No, you finish your homework first.
#74952
A
may, need
B
can, have to
C
do, must
D
may , must
—Everyone in my class passed the exam.—Oh, really? It ________ difficult.
#62802
A
can’t have been
B
needn’t have been
C
must be
D
mightn’t be