合并成从句：Are pigs clear?We all wonder.Have you been to the USA,

have you ever been to the USA HAVE you been to the USA?(作肯定回答） Have you ever been a___?yes,I have been to the USA before We are to have a holiday in the USA next month.中的are to have We are no longer friends/...the original,I have been you to how many of you have been to the usa?答句选什么 how many of you have been to the usa?起什么作用 选择题"Have you ever been to the USA?" "I wish I __" 求几道英语题答案!1.Have you all been to Sanya in Hainan?（ ）of usA.No is he from the usa? i wonder.合并 现在分词完成式1.we are happy to have been working with you.2.we are all the first times of mine have been given to you all the f