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【应该说Usedittobethoughtthattheearthwasflat吧答案选Useditbethoughtthattheearthwasflat觉得不大对劲儿】
题目内容：
应该说Used it to be thought that the earth was flat吧
答案选Used it be thought that the earth was flat觉得不大对劲儿优质解答
it used to do sth表示过去常常做什么
它的疑问和否定都有两种表达
疑问：used it to do./ did it used to
否定：it usedn’t to do/ it didn't used to
你的提问就是陈述句it used to be thought that ther earth was flat.采用了第一种疑问式变成的疑问句.以前人们认为地球是平的吗?
答案选Used it be thought that the earth was flat觉得不大对劲儿
优质解答
它的疑问和否定都有两种表达
疑问：used it to do./ did it used to
否定：it usedn’t to do/ it didn't used to
你的提问就是陈述句it used to be thought that ther earth was flat.采用了第一种疑问式变成的疑问句.以前人们认为地球是平的吗?
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