[題目] 時態問題

[kk04014 (tom)]

An increase in competition last year --------

significant drop in sales.

(A)     causing

(B)     causes

(C)     has caused

(D)     is caused

想問一下這題為什麼不能選A 而要選C

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推 iampincky   :last year，去年發生的事，所以"已經"造成...
推 yung0413    :選A的話 整個句子就沒有動詞了
推 wbw         :若要causing,必需是關係代名詞(which is) causing
→ wbw         :此處無需用到關係代名詞,因此用has caused
→ wbw         :你可改成An increase causing significant drop in
→ wbw         :sales in competition last year makes every
→ wbw         :staff stressful
推 wbw         :少打一個feel,應為feel stressful