I AM WORKING ON- IT.I WILL THINK-IT -OVER这些句子是不是在写的时候一定要加一横吗?

i am working on 翻译一下英语 I AM WORKING ON IT make difference.Now,I am working on 谁能讲出so—so与I am working on it 的区别 i am working on some bill it was a dissension 这样写对吗.. I AM WORKING ON- IT.I WILL THINK-IT -OVER这些句子是不是在写的时候一定要加一横吗? I am working on my computer和I am working with my computer有什么区别 i will lose what i am working on I am working on more grant applications 如何翻译 i am working I am working是什么意思 i am on it的意思请问I AM ON I am doing my homework和i am working on my homework有什么区别? i am doing it on bees could i use your mobile phone ----------.it isnt working的答语是i am sorry吗 I am working on his contract and will send it to you to review as to his vacation time and others.I am working on his contract and will send it to you to review as to his vacation time and others.He told me that he has not finished his 户口,no any I am working hard ( ）French.A.at B.for C.in D.on 英语翻译I am selling it as is for parts only not working no returns.