Attention, please. All of you students _______ remain in their seats until all the papers have been collected.
#86602
A
can
B
will
C
may
D
shall
推荐题目
 – Mary was crying sadly.  -- Oh, she ________ the bad news that her mother was badly injured in the accident.
#87842
A
must know
B
might have known
C
must have known
D
should have known
 You _______ late for yesterday’s class meeting, as it was so important.
#87848
A
couldn’t
B
shouldn’t be
C
mustn’t have been
D
oughtn’t to have been