Mary meets Betty while doing shopping in a supermarket,中的 while是什么意思,在句子中解释为什么?

Mary meets Betty while doing shopping in a supermarket,中的 while是什么意思,在句子中解释为什么? Mary and Betty are what does mary want betty to get? nobody but betty and mary _____late for class yesterday none of Mary,Betty or Tom are students 还是none of Mary,Betty and Tom are students怎么用 betty Mary is 3 years younger than Sam,and 1 year older than Betty.So Sam is ( ) years ( ) than Betty The storm prevented Betty and Mary ( ) yesterday.A.leaveB.to leaveC.from leavingD.of leaving The storm prevented Betty and Mary ( ) yesterday.A.leaveB.to leaveC.from leavingD.of leaving Betty does well in chinese.Mary does well,too.改为同义句.Betty does well in chinese.Mary does well,too.改为同义句．如下面,Mary does ___ ___ in chinese____ ____. 跳远成绩：Ann 4.11 Mary:4.69 betty:4.38 例子：Ann is a good jumper.( )is a better jump than Ann.( )is the( )jumper.---------------------------------比赛跑步成绩：Ann:10.54 Mary:10.21 Betty:10.36--------------------60m runner.---------- Frank,Emme,David,Betty,Lucy,Alice,Henry,Mary,Tom,John 哪些是男的名字,哪些是女的名字?Frank,Emme,David,Betty,Lucy,Alice,Henry,Mary,Tom,John 哪些是男的名字,哪些是女的名字? 1.___(you) English name Betty 2.____（be） you mary 3.___（I）name is Tom Betty和Mary是好朋友,贝蒂想送给玛丽一张生日卡片（卡片上……）请看问题补充.Betty和Mary是好朋友,贝蒂(Betty)想送给玛丽(Mary)一张生日卡片（卡片上写些生日祝福语、告诉她你和家人正在做什 ①-Where does your sister work,Betty?-She is in a hospital_____she works as a nurse.A.that B.whi①-Where does your sister work,Betty?-She is in a hospital_____she works as a nurse.A.that B.which C.where D.what我选的A,答案是C为什么?②No on 求帮写一篇英语作文,初一的水平,别太高级.Betty和Mary是好朋友,Betty想送给Mary一张生日卡（卡上写些生日祝福语、告诉她你和你的家人正在做什么等）.请你一Betty的名义写好这张生日卡,要求 首字母填空 Betty,Mary,David and Peter are going to Yinfa Home for the Aged on March 5th.Betty,Mary,David and Peter are going to Yinfa Home for the Aged on March 5th.They are going to h____ the old people there.Betty is going to look after Granny 变否定疑问句并作回答1.Daming gets music from the Internet.2.Tony meets his frients on Saturday morning.3.Betty and Lingling do their homework on Sunday.4.Lingling visits her grandma at the weekend.5.Betty watches television in the morning.