练习一.用 since 和 for 填空1.______two years 2.____two years ago 3.___last month 4.______ 1999 5._______yesterday 6._______ 4 o’ clock7 4 hours 8._____an hour ago 9.___we were children 10._____ lunch time 11.____ she left here 12. He has lived in Nanjing ___ the year before last. 13. I’ ve known him ______ we were children.14. Our teacher has studied Japanese ______ three years. 15. She has been away from the city ______ about ten years. 16. It’ s about ten years __________ she left the city. 二.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 finis...