He is_______his sister Mary's age.A.second B.three.C.two.D.twice

He is_______his sister Mary's age.A.second B.three.C.two.D.twice in sist on doing是什么意思 assist,persist...请问-sist是词根吗?thx 用所给的介词填空介词：in,on,at,of ,to ,for1.This is the classroom which he studied more than ten years ago.2.The famous player can play two chess games one time.3.He and his twin brother have a lot common.4.I'll come condition that my sist 1.When I am _____ trouble,he often gives me some _______.A.with,advise B.in,advices C.1.When I am _____ trouble,he often gives me some _______.A.with,advise B.in,advices C.have,advice D.in,advice2.I would like to buy a Walkman like ________.A.my sist 1.We are going to have no ciasses tomorrow.(改为同义句)2.he got here at 7:00.his sister got here at 7:00.(合并为一句)3.tom has breakfast at school.(用next week 改写句子) 1.we____ _____ ______have_____classes tommorrow.2.he and his sist ( ) 1.How _________ pupils are there in your school?A.much B.many C.long( ) 2.Mr.Green is a musician.He’s good at playing ___________ piano.A.a B.an C.the( ) 3.I usually go home __________ five o’clock in the afternoon.A.at B.in C.on( ) 4.My sist 英语翻译、Once there was a man who had two children,a boy and a girl.The boy was good-looking but the girl was not.One day they found a mirror for the first time and they saw what they looked like.The boy was very pleased and he said to his sist 根据句意及首字母提示完成单词.Mary is my a().She's my father's sister.用所给词的适当形式填空.These()[be] my rulers.Those are her ()[sister].Her()[parent]are in Beijing.()[her] is Kate's mother.()[he] mother is my mother's sist 任务型阅读 University He_____ Harvard University in 1973 可不可以只填一个词Bill Gates is head of the software company Microsoft and one of the world’s richest men.He was born on October 28,1955 and grew up in Seattle with his two sist This is my friend 和 These are my sist 改成否定句怎么改啊,急... Bob sits on my right.Lucy sist on my left(合并成一句) jim sist on my left.Julie sits on my rijht .（写出同义句）以I为主语 A`h(er) B`work(er) C`doct(or) D`sist(er) 那个括号里的读音与另三个不同 he he He 单数变复数词,急,把下列名词变成复数形式：name,clock,question,answer,boy,girl,telephone,number,phone,card,family,pencil,pen,book,eraser,rulrt,case,backpack,dictionary,English,baseball,watch,computer,game,key,notebook,ring,school,sist