英语过去将来时的概念

——————where is my rubber , mike ? ——————look , there is __ over there . is yours?A、one ;one B、it ;it C、it;oneD、one;it Look there!He ____my sister.A is B is and C and is D is with Look,there is a cat sleeping on the chair.Look,there is a cat sleeping on the chair.How lovely it_________(look)! 某班某次数学考试的平均成绩是85.5,男生的平均成绩是85,女生的平均成绩是87.该班的男生女生的人数比是（ ）：（ ）.又分加 Thanksgiving Happy Thanksgiving 英语选择I shouldn't be ______,but I have to got to go back home now.A.all ears B.all thumbs C.green fingers D.a wet blanket seven,night,get,at,have,I,home,by,o'clock,to 英语连句 x,y,z,分别是0到9中不同的数字,使xxxx加yyyy加zzzz等于yxxxz成立求出yxxxxz 编程求出使算式 * XXXX+YYYY+ZZZZ=YXXXZ…已知X、Y、Z分别表示0~9中不同的数字,编程求出使算式 * XXXX+YYYY+ZZZZ=YXXXZ成立时X、Y、Z的值 I have to be home by 10 o'clock(对10 o'clock 提问） I have to be home by ten o'clock.为什么不是be at home? i have to _____at home ____ten o`clock 1./,by 2.is,by 3.be,by 4,be,after Happy thanksgiving 如题 Happy Thanksgiving Day to all my friends!什么意思? happy thanksgiving 加不加day 如何回复 happy thanksgiving day 三角函数的对称中心怎么看? And I have to be in（ ）by 10pm. 三角函数对称中心是什么? 是不是所有的三角函数都有对称中心请问f(x)=sinx+根号3cosx+2的对称中心是多少还有想问一下三角函数的对称中心到底是指什么，还有一道题：sinx2-2msinx+m2+m-1>0(π/2≤x≤2π/3），求m的取值范围 The plane ______ at 7:00 pm, so I have to be at the airport by 6:40 at the latesta、leaves b、would leave c、will have left d、has left 英语提：The plane ______ at 7:00 pm,so I have to be at the airport by 6:40 at the latest第一题的选项：a、leaves b、would leave c、will have left d、has left39.She got married while she was still___.a.in her teens b.in her teen c.a teen 如图,△ABC的顶点A,B,C都在圆上,且弧AB=弧BC=弧AC,D是弧BC上的一点,连结AD,在AD上截取AE=DC试判断△BDE的形状,并说明理由. I have to be home by 10：00pm为什么是be home而不是go home 根据首字母填单词1.ack（h ） a TV2.my father and mother are my (p ).i am their (d ) ______do your father and mother work?怎么填?填东西~\(≥▽≤)/~11 求有关“形容工作好,忙却没人体谅”的讽刺诗句和谚语 这三个的拼音是什么? 三个鹿念什么?像矗,毳这样的结构~ I will be allowed to have Monday( )to go home( )内填写一个介词 上林下鹿念什么