MY SON ... AT UNIVERSITY FOR THE LAST TWO YEARS.A. HAS GONEB. HAS...

49. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

49. My son ... at university for the last two years.

a. has gone

b. has been

c. went

d. was

 b