Question

9. We wish we ____ what you did when we were at high school. A. did B. could have done C. have done

为什么选B

Answer 1

9. We wish we ____ what you did when we were at high school.
A. did B. could have done C. have done
答案：选择B，因为我们希望我们已经做过某事，而实际上没有做过，在这里 when we were at high school为过去时间，所以我们在读高中的时候没有做过，所以我们多么希望在那个时间能够去做你做过的事情，所以选择答案B。

Answer 2

我认为选答案"C”比较好。