是a used typewriter还是an used typewriter?应该是an used typewriter吧,但是有篇课文是a开头

是a used typewriter还是an used typewriter?应该是an used typewriter吧,但是有篇课文是a开头 是不是所有U开头的词前面都用冠词a?e.g.a used typewriter a uniform是说有的u打头的词钱都用a? a special typewriter是什么意思 谁能帮我翻译一下,Ribbon is an inked strip of cloth used for marking an impression as in a typewriter. No more typists working on a typewriter or computerworking 为什么要加ing?是定语吗 i don't play football now,but i _____when i was a child.是used to it 还是used to it 还是used toA used to B used to itC used to do This is the same typewriter as we used.为什么不用same..that.. used to 当过去常常解释时的被动语态是用be used to 还是用used to beThis kind of books_____in the library.A.was used to read B.used to be read Used he to be short?回答是Yes,he used.还是Yes,he used to. I used to wear a pair of 是glass还是glasses 英语71.-The green typewriter is mine.71.-The green typewriter is mine.-Do you know whose typewriter ____?A.is the blue one B.this blue one C.it is the blue one D.this blue one is为什么 英语17.-The green typewriter is mine.17.-The green typewriter is mine.-Do you know whose typewriter ________?A.is the blue one B.this blue one C.it is this blue one D.this blue one is为什么? Did you use to eat sweet when u were are a child?过去常常应该是used to 这里是use 还是 used there is a typewriter with acover on it in the office什么意思 there is a typewriter with acover on it in the office是什么意思 正确翻译It's a good place to sit with my typewriter 英语句子成分分析I've ever seen a word used that way before其中used that way是word的定语,还是补语?I've never seen a word used that way before Is she a teacher?--No,but she used to.此句后要be吗?这是一个对话.我不知道是用she used to be 还是she used to?