解题思路： 理解
解题过程：
before句型
1. It will be +时间+before …还有多长时间…
Eg. It will be 4 years before he graduates.
2. before sb… can/could…某人还没来得及…
Eg. The phone rang in the middle of the night, and the hung it up before I could answer it.
3. had done some time before…才…
Eg. They had sailed three days and three nights before they saw land. .
4. had not done…before不到…就…
Eg. We hadn’t walked a mile before he felt tired.
5. It was not +一段时间+before…
不多久就…
Eg. It wasn’t 2 years before he left the country.
I’m sorry you have been waiting so long, but it'll still be some time_____Brian gets back.
A. after B. since C. till D. before
It +be+some time+before 固定句型，题意为：仍然需要一段时间布赖恩才能回来。 同学：不知这样的解答您能否满意，如有不同意见，请在下面的继续讨论中留言好吗？拾贝老师愿意与您再次进行亲切的交流。匆忙中难免有疏漏，请多包涵哦。祝：学习不断进步，开心每一天！
最终答案：略
