单项选择题

A great deal has been done to remedy the situation.

A. maintain
B. improve
C. assess
D. protect
<上一题 目录 下一题>
热门 试题

单项选择题
All the cars are tested for defects before leaving the factory.
A. functions
B. faults
C. motions
D. parts
单项选择题
John is collaborating with Mary in writing an article.
A. cooperating
B. competing
C. combining
D. arguing
相关试题