she was having supper her telephone rang.A. While B. As soon asC. AfterD. Before

问题补充：

she was having supper , her telephone rang.

A. While

B. As soon as

C. After

D. Before

答案：

(答案→)A. While

B. As soon as

C. After

D. Before

解析：考查时间状语从句。While“当，而”，常与延续性动词连用；as soon as“一......就......”；after“在......之后”；before“在......之前”。句意“当她正在吃晚饭时，电话响了。”故选A。