He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
#90507
A
should
B
must
C
wouldn’t
D
can’t
推荐题目
Had Tom studied harder, he ________ the exam.
#86607
A
must have got through
B
would have got through
C
would get through
D
could get through
More and more people have come to realize that if we had taken effective measures much earlier, the air quality ______ so seriously now. 
#86958
A
is not polluted
B
would not be polluted
C
had not been polluted
D
would not have been polluted
—My cat’s really fat.—You _______ have given her so much food.
#89080
A
wouldn’t
B
couldn’t
C
shouldn’t
D
mustn’t