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It’s our duty to ________ our country when it is attacked by the enemy.

A.guard     B.protect    C.prevent    D.defend

 

D

考查近义词辨析。句意为:当国家受到敌人袭击时,保卫我们的国家是我们的义务。guard看守;守卫,强调看守或戒备;protect保护,强调提供某种障碍物以免受损害;prevent阻止,强调阻止某事发生;defend保卫;防御,强调用武力或其他手段抵御来自外界的危险或攻击。只有D项符合句意。

 

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