Why don't you go for a picnic tomorrow?改同义句

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• ①He fell behind the others.②Why don't you go by bus?改为同义句①He fell behind the others.改为同义句He couldn't _____ ______ with the others.②Why don't you go by bus?改为同义句______ ______ ______ by bus?
• why don't you go out to breathe the fresh air?怎么改同义词改写.该改哪儿?怎么改?
• What do you say to going to a movie?Would you like to go to a movie?第一句用GOING对吗 Why don't we go to see a baseball game?Yeah!)Let's go see a baseball game!还有这里 为什么前面试go to see 后面回答却是go see
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• If you don't say sorry to me ,I won't pardon you.改同义句
• Why don't you come to see me?(改为同义句）__________ come to see me?这两个空填什么?
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• Why don't you ask her for help 同义句转换 You______ ______ask her for help.
• 已知椭圆x^/4+y^=1的左右焦点分别是F1,F2,过原点作直线与椭圆交于A,B两点若三角形ABF2的面积为根号3,求直线方程
• 已知椭圆x^2/a^2+y^2/25=1(a>5)的两个焦点为F1、F2,且｜F1F2｜＝8,弦AB过点F1,则△ABF2的周长为?我算出a^2=41,且已经b^2=25,c^2=16但是我求不出弦AB的长度,如果能算出弦AB的长度应该就能算出周长了,请问我这么想对吗?如果对请问弦AB的长度怎么求````椭圆上一点到两个焦点的距离始终相等吗？所以AF1+AF2＝2a？