题目内容
John knocked at the door for nearly five minutes his wife opened it.
A. when B. before C. until D. while
B
![](http://thumb.zyjl.cn/images/loading.gif)
练习册系列答案
相关题目
题目内容
John knocked at the door for nearly five minutes his wife opened it.
A. when B. before C. until D. while