[文法] 請問
看板Language作者recover (Years Bring Wisdom)時間18年前 (2008/02/13 20:30)推噓1(1推 0噓 0→)留言1則, 1人參與討論串2/2 (看更多)
The likelihood of toxic pollutants and other carcinogens entering
the reservoir's filtration system "is" worrying many of the
district's residents who have drunk unboiled tap water recently.
請問上述為什麼要用is而不是are呢?
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02/13 21:14, , 1F
02/13 21:14, 1F
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