【題目】We can say __________ that their work is on the path of sound development.

A. on good evidence

B. on good proof

C. on a good evidence

D. on a good proof of

【答案】 A

【解析】proof，evidence二者都作“證據(jù)”講，詞組on( good) evidence表“依據(jù)(充分的)證據(jù)”，為固定搭配。

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