英语单选三道题目求大神解答

题目

英语单选三道题目求大神解答
1、
—— I wonder how much you charge for your services
—— The first two are free____ the third costs 30 dollars
A. while B. until C. when D. before
2、
A good friend of mine from ____ I was born showed up at my home right before I left for Beijing.
A. how B. whom C. when D. which
3、
We tried to find a table for seven, but they were all ____.
A. given away B. kept away C. taken up D. used up

答案