问题补充：
一Frank，you look worried．Anything wrong?
一Well，Ia test and I”m waiting for the result．
A. will take
B. took
C. am taking
D. take
答案：
A. will take
(答案→)B. took
C. am taking
D. take
解析：句意：Frank你看起来很忧虑，怎么了？我参加了测验，现在在等结果。Take a test参加测验从语境得知，他已经测试完了，要用过去时，took,故选B
