In the continuous high temperature weather it is not to fit to gather. That is we cancel

问题补充：

In the continuous high temperature weather, it is not to fit to gather.

That is we cancel the discussion

A. Why

B. Because

C. How

D. When

答案：

(答案→)A. Why

B. Because

C. How

D. When

解析：考察连词的选择。根据句子结构可知，该句为表语从句，从句中缺少原因状语，

句意为，在持续高温的天气下，不适合聚会，那就是为什么我们取消讨论的原因。