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It was not until then that I came to know that knowledge _______ only from practice.?
A.had comeB.has comeC.cameD.comes
D

試題分析:考查時(shí)態(tài)。本句中的knowledge comes only from practice是一個(gè)客觀真理;在任何情況下都使用一般現(xiàn)在時(shí)。故D正確。
點(diǎn)評(píng):在英語中表示客觀真理的句子在任何情況下都要使用一般現(xiàn)在時(shí),這是一條永遠(yuǎn)都不變的規(guī)則。
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