THEY THANKED ME _____________HELPING THEM. A. FOR B. TO C. ON D. IN

2. - DE KIEM TRA 1 TIET MON TIENG ANH LOP 11 SO 2 TRUONG THPT DOAN THUONG HAI DUONG NAM HOC 2016 2017 CO DAP AN
Tiếng Anh DE KIEM TRA 1 TIET MON TIENG ANH LOP 11 SO 2 TRUONG THPT DOAN THUONG HAI DUONG NAM HOC 2016 2017 CO DAP AN

2. They thanked me _____________helping them.

A. for B. to C. on D. in