The workers demanded that their employer_____ their working conditions. 
#86737
A
had improved
B
would improve
C
improve
D
will improve
推荐题目
Driving on the highway ______ be very dangerous, so you ______ be too careful.
#87841
A
should; ought to
B
could; should
C
might; mustn’t
D
can; can’t
 Look! That fellow is too sleepy to work. He ______ up reading until midnight.
#88455
A
mustn’t stay
B
mustn’t have stayed
C
ought not to stay
D
should not have stayed
He       you more help,even though he was very busy.
#89660
A
might have given
B
may give
C
must have given
D
might give