HE IS VERY WORRIED _______ HIS NEW JOB BECAUSE HE IS NOT QUITE PRE...

19. - 25 DE THI HOC KI 1 MON TIENG ANH LOP 12 CO DAP AN 19. - 25 DE THI HOC KI 1 MON TIENG ANH LOP 12 CO DAP AN
25 DE THI HOC KI 1 MON TIENG ANH LOP 12 CO DAP AN

19. He is very worried _______ his new job because he is not quite prepared _______ working.

A. on / over

B. to / off

C. about / for

D. in / at