SINCE 1980, JIM ... IN LONDON, AND HE IS STILL THERE NOW.A. WAS WO...

48. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

48. Since 1980, Jim ... in London, and he is still there now.

a. was working

b. worked

c. have worked

d. has been working

--> d