问题
_ more effective measures putin place, the disease has been brought _______ control
A:As
B:Once
C:While
D:When
B:Once
C:While
D:When
正确答案是：
同类题型
When did the couple die? -It was on May 12 the earthquake hit WenChuan County.
That hero who died in the war was so brave that he never _____ to the enemies until death.
Fifteen-year-olds ________ to have jobs in China.
The experiment shows that proper amounts of exercise, if_____ regularly, can improve our health.