_______that the ticket sales showed that the Shanghai Expo was one of the best e

题型：不详难度：来源：

_______that the ticket sales showed that the Shanghai Expo was one of the best ever held.

A．It is reported	B．What is reported
C．What reported	D．As is reported

答案

A

解析

试题分析：这个句子中，it是形式主语，真正的主语是后面that引导的主语从句。what放在句首时，that前应加系动词be，此时that引导的是表语从句；非限制性定语从句中的谓语为被动式时，常用as做主语，但这时as引导的非限制性定语从句与主语从句间应用逗号隔开，而不是用that引导了。所以选A。
点评：that从句作主语通常用it作形式主语，而将that从句置于句末。常见的it替代主语从句的主要举句型要牢记。