There is no light in the dormitory.They must have gone to the lecture_____1.didn`t they2.don`t they3.mustn`t they4.haven`t they要原因

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There is no light in the dormitory.They must have gone to the lecture_____1.didn`t they2.don`t they3.mustn`t they4.haven`t they要原因
There is no light in the dormitory.They must have gone to the lecture_____
1.didn`t they
2.don`t they
3.mustn`t they
4.haven`t they
要原因

There is no light in the dormitory.They must have gone to the lecture_____1.didn`t they2.don`t they3.mustn`t they4.haven`t they要原因
选4 havent they
关于must的疑问句应该根据实际情况而定.关于这道题应该对应下面的D条目下的第②条目下的第二点
A．must表示“应该”,其疑问部分用mustn't（不应该）,如：
You must work hard next term,mustn't you 下学期你应该努力学习,对吗?
B．must表示“必须”,其疑问部分用needn't（不必）,如：
They must finish the work today,needn’t they?他们今天必须要完成这项工作,是吗?
C．陈述部分含情态动词mustn't,表示禁止时,疑问部分就可以用must或may,如：
You mustn’t stop your car here,must you?(may we?)你不能把车停在这地方,知道吗?
D．must表示推测 ,其疑问部分必须与must 后面的主要动词相呼应.如：
①对现在动作或存在的情况的推测：
You must know the answer to the exercise,don't you?你一定知道这项练习的答案,是不是?
That must be your bed,isn't it?那一定是你的床,是吗?
②对过去发生的动作或存在的情况的推测：
a 表示肯定推测
（一）句中陈述部分没有表示过去的时间状语,这时疑问部分中的动词就用
现在完成时.（haven’t / hasn’t + 主语）
You must have told her about it,haven’t you?你一定把这事告诉她了,是吗?
（二）陈述部分有表示过去的时间状语,疑问部分的动词就用
一般过去时.（didn’t + 主语）
She must have read the novel last week,didn’t she?她上星期一定读了这本小说了,是吗?
b 表示否定推测
表示推测时,否定式通常不是must not,而是can't (cannot).如：
He can't have been to your home; he doesn't know your address,does he?
他不可能去过你家；他不知道你的地址,是不是?

我感觉应该是 didn‘t they？

There is no light tonight.翻译 Don't read in bed,for there is no ____.A.many light B.enough light C.light D.enough lights 英语翻译there's no red light in my life ; whatever you will do,is in your hands There is no light and everything becomes d____. what is dark when there in light?的意思初中英语look!the light in the teacher's office is on .there must be ___ in it.A.everyone B.someone C.no one D.anyone There is no light in the dormitory.They must have gone to the lecture_____1.didn`t they2.don`t they3.mustn`t they4.haven`t they要原因 there is no light in the dormory(宿舍).They must have gone to the lecture,___?A.didn't they B.haven't they There is no water in the pool there is no point in doing sth. is,no,there,milk,in,fridge,the There is no room ____________（stand in) there is no flash in the pen Don't read in bed,for there is no ( ) .A.many light B.enough light C.light D.enough lights还有类似的题：There's ( ) enough food in the world for everyone.A.too B.no C.not D.so My ___(ship/flight/ train )is early,so there is still ___(enough/light/no)t There is no harm in trying.There is no harm in trying.in trying是什么语法? 7.The APU FAULT light was on but there was no protective shutdown for the APU.a) The APU FAULT light comes on to show that there is a fault in APU.b) The APU was still running with the APU FAULT light illuminating.c) The APU FAULT light was on but th 求翻译：Because no one is no duty in this light blue little summer.