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① we all know, China is rich in natural resources. ② is well-known that China is rich in natural resources. ③ is well-known, China is rich in natural resources. A. Which B. As C. It D. That 【查看更多】

 

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①________ we all know, China is rich in natural resources．

②________ is well-known that China is rich in natural resources．

③________ is well-known, China is rich in natural resources．

A．Which

B．As

C．It

D．That

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