问题
The government has taken some measures to reconstruct the earthquake-hit areas, but it must be some time ____ everything returns to normal[ ]
A: since
B: after
C: unless
D: before
B: after
C: unless
D: before
正确答案是：
同类题型
My teacher’s words had a great _____my studying science at college.
We were told that ______ when Marx was already _______, he started to learn Russian.
I can’t finish the experiment by myself, so the honor____ to all the members in our team
k that something has to be done to stop the airfrom being polluted, ______