9．Takingoptional/elective（可選擇的）subjects will enrich our mind．

分析 選取選修課會豐富我們的大腦．

解答 答案是optional/elective．
本題考查語境中選用恰當?shù)脑~或短語；optional adj．可供選擇的，二者選一的；elective adj．可選擇的；  optional/elective subjects 選修課；故答案是optional/elective．

點評 翻譯填空要在理解句子的結構和含義的基礎上根據(jù)漢語意思選擇恰當?shù)脑~、短語或句型；同時注意所選詞的形式變化．

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