10.Linda is working in this department.She..has worked...(work) here for two years

11.Many people in this class...have seen..(see) tis beautiful house several times

12.They..lived...(live) in London from 1970 to 1990

13.They...have lived..(live) in China since 2000

14.We.have studied...(study) english at this school for a month

15.Our present teacher...lives....(live) in this city for all of his life

16.This boy..hasn't finished..(not/finish) his homework yet

17.I..have spoken..(speak) to him about your work several times already