- 單選題It seems oil( )from this pipe for some time.We'll have to take the machine apart to put itright.
- A 、had leaked
- B 、is leaking
- C 、leaked
- D 、has been leaking
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參考答案【正確答案：D】
該句時間狀語“for some time”表示“已有一段時間”，與has been leaking相呼應。譯：看起來這管子漏油已有一段時間了，我們必須把機器拆開修理一下。had leaked雖然也可以表示一段時間的持續(xù)，但與后一句we'll...時態(tài)和邏輯無法對應。
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- A 、Thanks to
- B 、By means of
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- A 、book review
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