同位语从句

　　同位语从句常位于idea， fact， news， fear， belief， doubt， proof， evidence等名词后面，对这些名词作进一步解释。同位语从句大多由关联词that 引导(that不可以省略)。如：

　　The fact that the money has gone does not mean it was stolen.

　　Have you heard the news that we will have a picnic next week?

　　There can be no doubt that my brother is qualified for the job.

　　Where did you get the idea that the class would be cancelled?

　　So far there is no proof _______ spaceships from other planets do exist.

　　A. which B. that C. how D. what

　　答案 B