Christmas is ____ the birth of Jesus Chris.答案是填celebrating还是to celebrate?为什么?求大神...

Christmas is (the 25th of december)对括号内容提问 What ____ ____ Christmas? ( )25th is Christmas Day she said that December 25th ____ Christmas Day.A is B was The teacher told us yesterday that Decemder 25th ____ Christmas day.(is,was) -____ ____ christmas?-on the 25th of December. 改错：Christmas is on December 25th on winter. Christmas Day is onDecember 25th 写出问句 选择填空.Our teacher told us yesterday that December 25th ____ Christmas Day.A.was B.is像12月25日是圣诞节是客观真理吗? Christmas is on Dember 25th.(对December 25th提问） _ _ Christmas?对日期提问 My birthday is ____ juiy 25th Today's ____ is February 23th. Christmas Day is on December 25th.(改为同义句） Christmas Day is on _____ _____ _____ _____. December 25th is ( )Christmas Day while October 1st is ( )National Day 这两处应填什么冠词 Nancy is th girl with____ ____ ____and____ ____添空 My birthday is February 13th (改为同义句)The ____ ____ ____ ____ is February 13th Christmas day is on December 25th对划线部分提问 (on December 25th)这是划线部分（）（）（）Christmas day？ 圣诞节是十二月二十五日英语怎么说可不可以说 christmas is december 25th ( )is the Christmas?It's on December 25th.填when还是what day