问题补充:
I when it began to rain.
A. was about to going out
B. was in the point of going out
C. was on the point of going out
D. both A and C
答案:
A. was about to going out
B. was in the point of going out
(答案→)C. was on the point of going out
D. both A and C
解析:本题考查固定搭配。be on the point of doing… when …正当做……的时候,突然……。句意:正当他要动身去火车站时,天开始下起雨来。