______that the earth was flat?

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问题 ______that the earth was flat?

选项 A、Used it to be thought
B、Did it used to be thought
C、Was it used to being thought
D、Does it used to be thought

答案A

解析 本题考查的是It used to do句型的疑问句形式。可以为“Used it to do...?”或者“Did it use to do...?”因此A项为正确答案。
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