题目内容
【题目】I often learn English by ________ English books.
A. reading B. read C. looking
【答案】A
【解析】by是介词,后跟动词的ing形式。
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题目内容
【题目】I often learn English by ________ English books.
A. reading B. read C. looking
【答案】A
【解析】by是介词,后跟动词的ing形式。