I when it began to rainA. was about to going outB. was in the point of going outC. was o

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。