We didn't laughing at him but helped him

We didn't laughing at him but helped him 英语水平不佳,小弟感激不尽!A large laugh through out the whole class .We felt so humour.And our teacher didn't know why wo were laughing at It's such a funny story that we can't help laughing when we hear it everytime翻译 When we heard this,we couldn't stop----为什么答案选B A.to laugh B.laughing We couldn't help laughing.help不是加do吗?难道laughing作动名词? They were all laughing at me,I really didn't _________?A.have great joy.B.have a good timeC.have a bad timeD.have no fun we didn‘t had a great time 有语法错误吗 we didn‘t had a great time 有语法错误吗 翻译 we didn't agree on a word. U___,we didn't watch a dolphin show同上 we invited them to have a picnic,but they___.A.want toB.didn'tC.didn't want to doD.didn't want go原因A.want to B.didn't C.didn't want to D.didn't want go we never dared to ask him question,A.did we B.didn't C.dared we D.daren't we we ---goo to the supermakerket last week.A.didn't B.aren't C.don't WE'D BETTER STAY AT HOME AND DO THE HOMEWORK,_____?A.WOULDN'T WE B.SHOULDN'T WE C.HADN'T WE D.DIDN'T WE We didn't take a bus.We took a taxi.(保持句意)we took a taxi () ()taking a bus. 翻译We had to wait a long time to get our passports,didn't we? We worked all day,_______ we didn't finish it.A or B also C but We didn;t eat here last week,.we?A.didn't B.haven't C.do D.did请帮我选正确答案以及原因