火眼金睛。请找出下列病句中的一处错误，并把序号填在横线上。
Does your mother teach Chinese? ---_______________ A. Yes, she does. B. No, she isn’t.
What are your pen pal’s hobbies? ---________________ A. He likes doing kung fu and dancing. B. He’s doing kung fu.
A ______ works in a bookstore. A. writerB. bookseller C. reader
A ______ can help you find the way. A. dancerB. doctor C. policeman
Can you ______? Yes, I can. A. swim B. swims C. swimming
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