问题
We should take measures to improve ___________ is called the quality of living.
A:that
B:which
C:who
D:what
B:which
C:who
D:what
正确答案是：
同类题型
It is impossible for _____ little children to do _____ much work within 20 minutes.
top of the mountain ______, dating from the 14thcentury.
eatest pleasure I know is to do a goodaction quietly, and to have it _____ by accident
The course normally attracts 20 students per year, ____ up to half will be from overseas.