----Are you sure it’s going to snow this weekend? ----.A. I don’t thinkB. I think not soC.

问题补充：

----Are you sure it’s going to snow this weekend? ----.

A. I don’t think

B. I think not so

C. I don’t think about it

D. I don’t think so

答案：

A. I don’t think

B. I think not so

C. I don’t think about it

(答案→)D. I don’t think so

解析：句意：你确信周末会下雪吗？我认为不会下。我认为不是这样的，有两种表达：I think not / I don’t think so，所以选D。