问题
选择题
.
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
答案
答案:D
.
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
答案:D