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It was not until then that I came to know that knowledge _______ only from practice.?

A. had come B. has come

C. came D. comes?

D?


解析:

主句雖然是過(guò)去時(shí)態(tài),但從句所說(shuō)明的是不受時(shí)間限制的真理或事實(shí),名詞性從句的謂語(yǔ)動(dòng)詞仍然用一般現(xiàn)在時(shí)。又如:He said Asia is the largest continent.

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