I was talking with my mother on the phone when we were ____ suddenly.没看懂

题目

I was talking with my mother on the phone when we were ____ suddenly.没看懂
84、I was talking with my mother on the phone when we were ____ suddenly.
A.cut downx09x09x09
B.cut offx09x09x09x09
C.cut acrossx09x09x09
D.cut back
这句话的意思究竟要表达什么，怎么没看懂？我和我妈妈在聊电话当我们突然被打断？有谁能翻译下吗
为什么要用when，看起来很不通顺的样子。

答案