＿＿＿used to be thought that the earth was square. A. HeB. WhatC. ItD. That

发布时间：2020-08-17 12:54:14

＿＿＿used to be thought that the earth was square.
A. He
B. What
C. It
D. That

网友回答

A. He
B. What
(答案→)C. It
D. That
解析：it作形式主语，代替真正主语that从句。
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