SHE IS TEACHING TWO CLASSES AND IS EXAMINING AT A LITERATURE EXAM...

13. - TRAC NGHIEM TIENG ANH C
TRAC NGHIEM TIENG ANH C

13. She is teaching two classes and is examining at a

literature exam tomorrow. ________, she is chairing a

meeting at the Pen Club.

B

(A) on the top of it

(B) on top of it

(C) at the top of it

(D) at top