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        1. One of the difficulties we have         English is how to remember new words and expressions.
          A.to learnB.in learningC.learnD.learned
          B
          定語從句的用法。句中的主語含有一個定語從句,省略了關(guān)系代詞that,one of the difficulties是作為定語從句中的賓語。have difficulty ( in ) doing sth.做某事有困難,句意“我們學(xué)習(xí)英語的一個困難是怎樣記住新的單詞和表達”,因此選B。
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