__ It is so late. Our son __________ be back . __ Don’t  worry . I dare say he ________ have some extra work to do.
#88334
A
can ; must
B
will ; might
C
should ; must
D
must ; may
推荐题目
 The door______. Better have it repaired .
#89515
A
isn’t shut
B
hasn’t been shut
C
won’t be shut
D
won’t shut
Mr. Smith insisted that his book _______within three days.
#86766
A
returned
B
would be returned
C
should return
D
be returned
What would have happened____, as far as the river bank? 
#89939
A
if Bob has walked farther
B
if Bob should walk farther
C
had Bob walked farther
D
if Bob walked farther