题目内容
________ used to be thought that the earth was flat.
[ ]
A.He
B.What
C.It
D.That
答案:C
解析:
解析:
|
it形式主语。 |
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题目内容
________ used to be thought that the earth was flat.
A.He
B.What
C.It
D.That
|
it形式主语。 |