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Petertriedtocrosstheborderthreemoretimes

問題詳情:

Petertriedtocrosstheborderthreemoretimes

Peter tried to cross the border three more times _____ he finally succeeded.  

A. when              B. as                    C. after               D. before

【回答】

D

知識點:連詞

題型:選擇題

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