问题
选择题
—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
答案
：D
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。