問題詳情

33. The idea for the new machine came to Mr. Lane _______________ to work last week.
(A) while driving
(B) while was driving
(C) as he drives
(D) when he has driven

參考答案

答案：A
難度：困難0.3125
統計：A(5),B(2),C(3),D(3),E(0)