---  ________ have you kept the book ? --- Since last Month. I ________ return it to the library today or I can’t borrow one next time. 
#74561
A
How often; must
B
How long; have to
C
How soon; have to
D
When; must
推荐题目
He______ his work, otherwise, he wouldn’t be enjoying himself by the seaside.
#62448
A
must have completed
B
should have completed
C
ought to complete
D
must complete
We ________ like to thank the honest boy.
#77763
A
had
B
was
C
could
D
would
You are tired. You _____ go to bed early.
#77293
A
can’t
B
should
C
aren’t
D
shouldn’t
—May I take photos in the museum? —No, you        . You       obey the rules here.
#74471
A
may not; can
B
mustn’t; may
C
can’t; can
D
mustn’t; must