They have had a long and bitter struggle _____their living conditions.
#98367
A
to improving
B
for improving
C
to improve
D
improve
推荐题目
Why do you have the water _____ all the time? 
#98256
A
ran
B
to be running
C
running
D
being running
I didn't do very well in the exam, and so I’m afraid of ____.
#98818
A
scolding
B
to be scolded
C
being scolded
D
scolded
Film has a much shorter history, especially when_     such art forms as music and painting.
#94936
A
having compared to
B
comparing to
C
compare to
D
compared to