It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off. 
#90290
A
may
B
can
C
will
D
shall
推荐题目
The doctor suggested he ______.                   
#88170
A
not smoke
B
don’ t smoke
C
doesn’t smoke
D
no smoke
They demanded that the books________ to the school library at once. 
#86780
A
return
B
should return
C
be returned
D
would be returned
(2013·山西高三诊断)Honey, you ________ alcohol for they have stopped drinking.
#86569
A
may not have bought
B
mustn't have bought
C
can't have bought
D
needn't have bought
Without electricity human life _____ quite different today.  
#87207
A
is
B
will be
C
would have been
D
would be