—May I remind you that a Mr. Wang is waiting outside, sir?—Oh, that’s right. Iabout it.A.

—May I remind you that a Mr. Wang is waiting outside, sir?
—Oh, that’s right. I about it.
A. forget
B. had forgotten
C. forgot
D. have forgotten

A. forgetB. had forgotten(答案→)C. forgotD. have forgotten解析：forget是发生在第一个人提醒（remind）之前，表示瞬间的过去。故选C

这个答案应该是对的