（） the door slowly opened, there was a hysterical scream of terror.

分类: 作业答案 • 2021-12-29 10:06:10

问题描述：

（） the door slowly opened, there was a hysterical scream of terror.
A：When
B：While
C：As
D：Whenever

答

A
表示当
while必须有一个是进行时态
as一般不放在句首
whenever无论何时,让步状语从句,不对

（ ） the door slowly opened, there was a hysterical scream of terror.