题目内容

按要求变换下列句型
1. This is a pencil case. (变一般疑问句)
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2. Is that her key? (做否定回答)
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3. not, is, my, this, book  (连词成句)
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1. Is this a pencil case?
2. No, it isn't.
3. This is not my book.
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