It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off.
#87654
A
may
B
can
C
will
D
shall
推荐题目
You       very fast if you went from New York to Boston in six hours.
#87487
A
should drive
B
must have driven
C
may drive
D
would have driven[
How happy we _______, if you had come with us to the party. 
#89782
A
could be
B
may have been
C
would have been
D
were
___ , we would have taken raincoats with us.
#89062
A
Had we known
B
We had known it
C
If we were known
D
If we know