—Peter looked tired and a little absent-minded in class． —He _____ too late．
#87899
A
may stay up
B
could stay up
C
should have stayed up
D
must have stayed up
推荐题目
—Why didn’t Susan come to school? —I don’t know. She____ ill.
#87988
A
could be
B
may have been
C
might
D
must have been
—This wall of air is an effective answer to the problem and it ____ work. —But it is a question to put such a wall of air around the statue.
#89204
A
may
B
must
C
should
D
could
But for your timely help, the boy ______ his life.
#87798
A
must have lost
B
may lose
C
might have lost
D
should lose
--- Do you know Uncle Tom is crazy about gardening?---Sure. He ____ his flowers in the garden now.
#90396
A
may be watering
B
must be watering
C
could look after
D
ought to watch