精选优质文档-倾情为你奉上现在完成时练习题及答案详解单项选择。1、Both his parents look sad . Maybe they _whats happened to him.A. knew B. have knownC. must know D.will know2、He has _ been to Shanghai , has he ?A. already B.neverC.ever D. still3、Have you met Mr Li _?A. just B. agoC.before D. a moment ago4、The famous writer _ one new book in the past twoyear .A. is writing B.was writingC.wrote D.has written5、Our country _ a lot so far .Yes . I hope it will be eve
