— __________ we leave the library before 5 o’clock?— No, you needn’t. You can stay here until 5:30. 
#74504
A
Must
B
May
C
Can
D
Could
推荐题目
His failure suggested that he   the teacher’s suggestions.
#62975
A
can’t have followed
B
needn’t follow
C
mustn’t have followed
D
shouldn’t follow
We         arrive at six. But I’m sorry we are late. 
#63290
A
should
B
were supposed to
C
must
D
ought to