18．She was helpful and  trustworthy，so she was elected ________monitor of________Class 2．（　�。�
A．the；不填B．the；theC．不填；theD．不填；不填

分析 她樂于助人并且值得信任，因此她被選為2班的班長．

解答 答案：D．
考查零冠詞．monitor"班長"，是職務(wù)名稱，不需要加冠詞；Class 2"2班"，是專有名詞，不需要加冠詞，故選D．

點(diǎn)評 本題考查零冠詞的用法．總結(jié)如下：節(jié)日名稱前；專有名詞前；抽象名詞和物質(zhì)名詞前；月份、星期、季節(jié)前；名詞前有指示代詞、不定代詞、名詞所有格修飾時；表示一類人或事物的復(fù)數(shù)名詞前；職位、頭銜前；三餐、球類、棋類前．

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