Sofar,theair

问题详情：

So far, the air ___________ really polluted around here. I’m really ___________ worried.

A. has become; getting                    B. have become; getting  

C. has been becoming; got              D. has been becoming; got

【回答】

A   前半句So far提示用现在完成时，根据句意，后半句用现在进行时。

知识点：动词时态

题型：选择题