The light is still on. They ___ to turn it off when they left the room.
#87772
A
must forget
B
could have forgotten
C
may forget
D
must have forgotten
推荐题目
Perce Blackborow and his companions stayed on Elephant Island for six months before rescue came, so they ________ a lot of difficulties.
#87871
A
must go through
B
may go through
C
must have gone through
D
could have gone through
The doctor said I was over-weight. If only I _____ less!
#89982
A
ate
B
have been eating
C
have eaten
D
had eaten
The project was carefully planned, or a great deal of money ________.
#86486
A
will lose
B
will be lost
C
would have lost
D
would have been lost
His failure in the exam suggested that he __________ the teacher’s instructions.
#89495
A
can’t have followed
B
needn’t have followed
C
mustn’t have followed
D
shouldn’t have followed