句型转换。
1.This is a pencil case. (变为一般疑问句)
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2.Is that her key? (否定回答)
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3. not, is, my, it, backpack (连词成句)
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4.This is a pen in English. (对画线部分提问)
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5.It is a ring. (对画线部分提问)
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