Sep.1 is the first day of a new term.We have to return back to school that day.在这个题中为什么改错把back去掉,

Sep.1 is the first day of a new term.We have to return back to school that day.在这个题中为什么改错把back去掉, 1.what`s the dath today?-----A.sep.28 b.oct.1 C.oct.2 D.Sep.30 in sep 2008 zhaizhigang became the first person to walk___outer space in the history of china 英语定语从句的问题(请解释)1.sep 18,1931 is the day______we'll nerve forget.A.on which B.in which C.that D.for which(怎么不是A)2.do you remember the day _____you first came to shanghai这里为什么是on which3.do you still rememeber 英语句子的填写It's on the t( ) day after May Day.T( ) Day is on the t( ) of Sep-tember and October First is our National Day. 3.--is not necessarily the best.A.First B.The first C.At first D.Be the first Today is（ ）day at school.A.first B.the my first C.my first D.my the first Mary is always ______ leave the classroom.A.firstB.first student toC.the first D.the first to January is ___month in a year A:first B:the first C:one D:the one Tom is the first? Today is __.A.the first of May.B.May first.C.the first May.D.One May The man is David Johnson.Johnson is his___name and David is his___name.A.family,first B.first,family C.first.last D.last,first 一道单项选择Tom is( )one to get to school.A.one B.first C.the first D.a first The first is always the The first is red.first是什么词性? 1 the tenth term of an arithmetic series is 67 and the sum of the first twenty terms is 1280.find the common difference ,d and the first term a .2 if the first term of an arithmetic sequence is 3 and the hundredth tern is 307,then find the sum of the Today is () birthday in china.A.Jim's first B.first Jim's C.Jim's the first D.Jim first The ( ) name is also the first name.A.family B.last c.given D.first说出理由.