celebrates

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( )back 3000 years,it celebrates the passing of a peaceful year and welcomes a new one.

参考答案:All the objects can be dated 用被动态即可

The world celebrates Earth Day on April 22 every

应该是 The world celebrates Earth Day on April 22 every year,意思是 “全世界都在每年四月二十二日这一天庆祝地球节的”。

he happily celebrates Christmas with his relative

强调吧