ROBERT ……… FOR YOU SINCE NOON A. HAS BEEN WAITED B. WAITED ...

16. - BAI TAP CAC THI TIENG ANH 60 DAP AN
BAI TAP CAC THI TIENG ANH 60 DAP AN

16. Robert ……… for you since noon

a. has been waited       b. waited      c. has been waiting    d. is waiting