题干
找出错误并在横线上改正。
They have few friends, have they?
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答案(点此获取答案解析）
have 改为 do
找出错误并在横线上改正。
They have few friends, have they?
____
有多种同分异构体，其中属于酯且苯环上有2个取代基的同分异构体共有