—Do you think the fine weather will keep up?
— .
A. I believe it
B. I don’t believe it
C. I believe not so
D. I don’t believe so
网友回答
A. I believe it
B. I don’t believe it
C. I believe not so
(答案→)D. I don’t believe so
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。