几个初中英语问题（连词）

几个初中英语问题（连词）
The book was so interesting that he had read it for three hours___ he realized it.
A when B until C after D before
填空
Will you come over ____ have coffee with me this weekend?
You'll have to wait ___ help comes,because there's no other way.
You can't make progress ____ you devote more time.
The clouds are gathering .It looks ____ it is going to rain.
We haven't decided ____ and ____ to meet next time.
根据中文,完成英语句子
虽然中国现在不富裕,但我们正努力改变她.
_____ China is not rich now,____ we are working to change her.
为了赶上早班汽车,你最好尽快起床.
You'd better get up ____ ____ ____ possible ____ ____ you can catch the early bus.
句型转换
I don't know how I can get to the nearest post office.
I don't know ____ ____ ____ to the nearest post office.