问题
.Nowadays .all passengers go through safety check before take a train.
A:can
B:may
C:must
D:will;
B:may
C:must
D:will;
正确答案是：
同类题型
The boss ______ the worker how to do it, or the accident couldn’t have happened.
He often ________books ________thelibrary．
1An old friend of mysister’s always helps my brother and withEnglish.
Could you please show ____ your ticket — Here you are.
In fact, the house as well as his two cars ______ him all the money he earned during the 20 years