题目内容
根据句意和汉语注释,写出单词的正确形式。
If you have any ________(困难)working out the problem, please ask the teacher.
答案:difficulty
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题目内容
根据句意和汉语注释,写出单词的正确形式。
If you have any ________(困难)working out the problem, please ask the teacher.