Question

--Hi, Vera, have you checked the account yet?

--Certainly, I _______ it five times even though you told me to do it twice.

1. A.
   checked
2. B.
   will have checked
3. C.
   have been checking
4. D.
   had checked

Answer 1

A
“检查”这一动作发生在过去，且发生在从句动作told之后，因而用一般过去时。