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Theearthwon’tbefitforustolivein

欄目: 練習題 / 發佈於: / 人氣:3.22W

問題詳情：

Theearthwon’tbefitforustolivein

The earth won’t be fit for us to live in _____ we go on polluting it.

A. even if B. if C. unless D. so

【回答】

B

知識點：連詞

題型：選擇題

Tags：Theearthwon tbefitforustolivein

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