Ifyoucanimproveyourstudymethod，Id

发布时间：2020-07-26 23:48:55

If you can improve your study method，I don't think you will have difficulty________English．A.to learnB.learnC.to learningD.learning

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D解析分析：原来是have difficulty(trouble)in doing sth(做某事有困难)，in可以省略，成了have difficulty(trouble)doing sth．
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