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- 4people can know some rules____the notice signs at the gateof the park.
- 5已知x加y等于三又二分之一,xy等于二分之三,求4x+3xy+4y的值
- 6The acronym F2F s___ for faceto face.symbol可以填吗?
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- 8She _ her friends to her party.
- 928 21 14的公因数
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