A and B are doing their homework. 对A and B提问 答案who is doing their homework. 为社么是is不是are?

My sister and I_____.A.am doing my homework B.is doing my homework C.are doing our homework D.are doing their homework A and B are doing their homework. 对A and B提问 答案who is doing their homework. 为社么是is不是are? tom and i ( ).A,am doing my homework.B,is doing his homework.C,are doing our homework.D,is doing 排个200字左右的英语对话and B are talking about the 16th Asian Games.They are exchanging their opinions /impression of the opening ceremony,and talk about their favorite athletes,sports and the advantages of doing exercise. A who are the boys?B- -Tom and Mike.A what are they doing?B- -table tennis. What ____ Amy and Sam doing?a.are b.am c.is 有关and的用法单项选择：My brother and I( ).A.is doing my homework B.am doing my homework C.are doing our homework D.are doing our homeworks what is you doing,mum?A are doing B are do C is doing what are Lucy and Mary doing they are busy______their homework.a.to do b.do c.on d.with快. Start by doing what's necessary,then what's possible_suddenly you are doing the impossible.A and B finallyC SOD therefore 请问为什么选A are we doing a before and after piece _____that is important is that you are doing your best and moving in the right direction.A.One B.All C.Everything D.Anything解释一下,不要讲得太深奥.句子是缺成分还是固定词组?谢谢对了，我的印象中老师好像说过All th Trees should only be pruned when there is a good and clear reason for doing so and,fortunately,th look!what___over there?a.does he do b.do they doc.are the twins doing d.is your father and mother doing单选写原因 Jim and his brother are doing()homework now.A they B their C them 告我原因好吗? Getting up early and doing morning exercises _________good for your health.A.is B.are C.was D.were ____that's important is that you are doing your best and moving in the right direction.A.one B.all What are the students doing?Some are reading,and __ are wirting.A the other B others C other D another 说明原因,并作词性分析