SHE DID ALL THE WORK ... HER OWN. A. BY B. ON C. FOR D....

174. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

174. She did all the work ... her own.

A. by

B. on

C. for

D. at