题目内容
【题目】— What is the machine used for? — It's used for (learn) English.
【答案】learning
【解析】learn学习(动词)。介词for后跟动词ing形式,故填:learning。
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题目内容
【题目】— What is the machine used for? — It's used for (learn) English.
【答案】learning
【解析】learn学习(动词)。介词for后跟动词ing形式,故填:learning。