I go back to sleep when suddenly my bedroom became as bright as day.A. was about toB. was

问题补充：

I go back to sleep when suddenly my bedroom became as bright as day.

A. was about to

B. was just to

C. would

D. was to

答案：

(答案→)A. was about to

B. was just to

C. would

D. was to

解析：考查时态。该句为固定结构，即sb be about to do sth when .... 意为某人正要干某事的时候，突然……。

句意为，我正要回去睡觉，突然我的卧室里变得和白天一样亮。