It used to be thought the Earth was flat.A. as B. when C. since D. tha——青夏教育精英家教网——

摘要： It used to be thought the Earth was flat.A. as B. when C. since D. that[解析]D.it 为形式主语.此句为 People used to think that the Earth was flat 的被动语态形式.

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It used to be thought _____ the Earth was flat.

A. as B. when

C. since D. that

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It used to be thought _____ the Earth was flat.

A. as B. when

C. since D. that

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. It used to be thought _____ the Earth was flat.

A. as B. when C. since D. that

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It used to be thought _____ the Earth was flat.

A. as B. when

C. since D. that

查看习题详情和答案>>

. It used to be thought _____ the Earth was flat.

A. as B. when

C. since D. that

查看习题详情和答案>>