问题

It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off.

A:may
B:can
C:will
D:shall

正确答案是：

同类题型

Could it be in the room____ we had a talk last night ____ you left the key?

In the past 30 years China ______great advances in the socialist revolution and socialist construction

Much attention should ______ the environment and fighting against pollution

The chair looks rather hard, but in fact it is very comfortable to _______.[ ]

The waterfall can be seen____Its sound may be heard ____twomiles.It looks even morebeautiful ____, I think[ ]