[題目] 新多益必考單字600 L.30 P.189 第14題

[BeanBryant (豆子先生)]

書名：新TOEIC必考單字600
版本：3rd edition
頁數：p.189 第十四題
題目：
        _________ as it does, I don't understand how anyone can depend on that

        country's market to provide a safe investment.

        (A)Fluctuated
        (B)Fluctuating
        (C)Fluctuation
        (D)Fluctuate

疑問：為甚麼是B，我以為選B的話，後面應該要接as it is...而這題我剛看的時候覺得

      每個答案都不對啊啊啊啊 >__< 誰可以解釋一下這個句型嗎，先謝謝了，拜託。

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