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同义句是：they are going to come to visit our school this afternoon/they are about to come to visit our school this afternoon
希望对您有用,顺祝您天天开心
望采纳谢谢可是they和to visit间只有2个空。。。您好，那可以填are about希望对您有用，祝您开心望采纳谢谢