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2．It wasunbelievable （難以置信的） that such an honest fellow should have betrayed his friends．

分析 真是難以置信這樣一個老實人竟然出賣了他的朋友

解答 unbelievable 考查形容詞．根據句意：真是難以置信這樣一個老實人竟然出賣了他的朋友．unbelievable是形容詞"令人難以置信的"，在句中做表語．

點評 本題考查形容詞的詞義．形容詞詞義一直都是高考考查的一個熱點，它注重考查考生結合語境準確選用詞語的能力．由于英語詞匯豐富，且用法多變，考生掌握起來有較大難度，因此在平時應注意詞匯的積累，理解詞語的含義及其常見的習慣搭配，再聯(lián)系句子所表述的意義和語境，選出正確的答案．

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