The war was over about three months ago the American soldiers in Iraq are still having a

问题补充：

The war was over about three months ago, the American soldiers in Iraq are still having a lot of trouble to deal with.

A. or

B. and

C. but

D. so

答案：

A. or

B. and

(答案→)C. but

D. so

解析：考查连词。句意:战争三个月前结束了，但是在伊拉克的美国士兵仍有许多麻烦要处理。所以选C,表转折。