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Iwrotetomyfriendonceaweek

練習題2.5W

問題詳情:

Iwrotetomyfriendonceaweek

I wrote to my friend once a week____  I was too busy with my work.

A. it    B. unless   C. as   D. when

【回答】

B

知識點:連詞

題型:選擇題

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