---Do you think the fine weather will keep up?
---______A.I believe itB.I don’t believe itC.I believe not soD.I don’t believe so
网友回答
D解析I don’t believe so.="I" don’t think so.="I" believe/think not.so可用来代替宾语从句，常置于一些表示看法、意见的动词believe/think/suppose/hope,etc.之后，用not表否定。