___ Mr.Li called while you were out.He was in ____ very bad mood.

问题描述:

___ Mr.Li called while you were out.He was in ____ very bad mood.
A./;a B.A;a
选A呢?这两项有什么区别?

如果选 A ,意思是:
当你不在的时候李先生打电话给你,他的心情很糟糕.
如果选 B,意思是:
当你不在的时候有一位李先生打电话给你,他的心情很糟糕.选A不可以吗?两个选项都对,只是看你要表达什么意思。