20．As students，we ought to    the act of cheating in the exams．（　　）
A．provideB．preferC．prevent

分析 作為學(xué)生，我們應(yīng)該防止考試作弊行為．

解答 答案：C；provide提供，prefer更喜歡；prevent預(yù)防； 阻止；根據(jù)句中信息As students，we ought to…the act of cheating in the exams，推測(cè)該句句意：作為學(xué)生，我們應(yīng)該防止考試作弊行為．故選C．

點(diǎn)評(píng) 首先根據(jù)語(yǔ)境，細(xì)讀選項(xiàng)，然后通過題干中的已供信息，捕捉到解題線索．

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