He can't be in the classroom,I saw him go home a minute ago 我想问一下问什么不能用mustn't而用can't?

I think he must be in the office now,______?A.don’t I B.mustn’t he C.isn’t he D.can’t hethe reason,please! 请问一下1.The light is out.He ____ __ be in the classroom.A.can’t B.must C.can D.mustn’t simon --- be in the classroom.he'sill and stays at home.A.isn't B.mustn't C.may not D.can't i think he may be in the classroom. No , he () be there. i saw him in the dining room just nowA: mustn't B: can't C: may not D: might not i didn't break the window.It __ the truth.He is lying.can't be mustn't be shouldn't isn't 选哪个A.can't be B.mustn't be C.shouldn't be D.isn't Jack ____ be in the library.He is in the classroom.A.mustn't B.can't 选什么呢? -----Where is Mr.wang Has he been in the library?-----He____ there.He was here just now.A can't be B isn't C mustn'be D wouldn't 只能选A吗 为什么? The man in this photo be over 60!He looks so old!A.could B.couldn't C.can't D.canThe man in this photo be over 60!He looks so old!A.could B.couldn't C.can't D.can选什么 说明理由 —How wonderfully Jim is swimming in the pool!—It __ be him.He is ill in bed now.A.needn't B.mustn't C.can't D.shouldn't选什么,并给出解析 一些反义疑问句的题目 1.He can’t be her father,_____ he?A.is B.isn’t C.can D.can’t 2.You’d better go at once,_____ you?A.hadn’t B.did C.didn’t D.don’t 3.She doesn’t think that Tom sings best in the class,_____ A.does she B.do ---where is xiao wang?---i don't know.he ( ) be in the library a can b must c might d may I don’t _____ him.He _____ be serious.A.believe ; can’t B.believe in ; mayn’t C.believe ; can D.believe in ; must Our teacher must be in his office,A mustn't he B can't he C isn't he D must Do you know where Tom is?He was in the reading room just now.He ____ there now.Do you know where Tom is?He was in the reading room just now.He ____ there now.A,will be B,is C,must be D,can′tD是can′t be！打错啦啊⊙﹏⊙b汗 He is not tall.He can`t reach the basket.(同义句) He is not__ __ __to reach the basket.2 ___you can___our school contest.A Maybe;in B Maybe;be in C May be;in D May be;be in 1.I don't like ------ you speak to her.A.the way B.the way in that C.the which D.the way of which2.He has a good eyesight.He can see-----the distant island in the sea.A.as long as B.so far as C.so long as D.as far as3.The how to book can be of help t He must be in the classroom ,___he?A mustn't B needn't C hasn't D isn't he　can什么in　the　hospital a,cured　b,be　cured　c,cure　d,curing'