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The theory he had stuck to be true. [ ] A.provedB.to proving C.to proveD.to prov

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The theory he had stuck to be true. [ ] A.provedB.to proving C.to proveD.to prov

The theory he had stuck ________ to be true.

[]

A.provedB.to provingC.to proveD.to proved

试题答案

答案:D