. . 现在完成时专项练习题及答案一、单项选择。1、Both his parents look sad . Maybe they ________what's happened to him . A. knew B. have known C. must know D.will know 2、He has _______ been to Shanghai , has he ? A. already B.never C.ever D. still 3、Have you met Mr Li ______?A. just B. ago C.before D. a moment ago 4、The famous writer _____ one new book in the past two year . A . is writing B .was writing C .wrote D .has written 5、— Our country ______ a lot so far . — Yes . I hope it will be even ______ . A . has changed ; well B. changed ; good C. has changed ; better D. changed ; better 6、Zhao Lan ______already ______in this school for two years . A. was ; studying B. will ; study C. has ; studied D. are ; studying 7、We ______ Xiao Li since she was a little girl . A. know B. had known C. have known D. knew 8、Harry Potter is a very nice film .I_______ it twice . A. will see B. have seen C. saw D.see 9、— These farmers have been to the United States . — Really ? When _____ there ? A . will they go B . did they go C . do they go . . D. have they gone 10、— ______ you ___ your homework yet ? — Yes . I _____ it a moment ago . A. Did ; do ; finished B. Have ; done ; finished C. Have ; done ; have finished D. will ; do ; finish 11、His father ______ the Party since 1978 . A. joined B. has joined C. was in D. has been in 12、— Do you know him well ? — Sure .We _________ friends since ten years ago . A. were B. have been C. have become D. have made 13、— How long have you ____ here ? — About two months . A. been B. gone C. come D. Arrived 14、Hurry up! The play _________...