19．To her joy，Della earned first the trust of her students and then _____of her colleagues．（　�。�
A．thatB．oneC．onesD．those

分析 讓Della高興的是，她先贏得了學(xué)生的信任，后來也贏得了同事的信任．

解答 答案：A 題干中的代詞用來指代的是前面的trust，信任，抽象名詞；one指代可數(shù)名詞單數(shù)，ones指代復(fù)數(shù)，those同樣指代復(fù)數(shù)．故選A．

點(diǎn)評 指示代詞數(shù)量很少，但用法靈活．學(xué)習(xí)時要注意它們的指代對象和用法區(qū)別．

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