mọi người chuyển về dạng đúng của đ.từ trog ngoặc hộ e vs
1. I(see)................that film before
2 When I got up, my sister (clean)..................the room
3. When he was at school, he (study).....................biology very well
4. He gave money to the taxi driver,(say)............goodbye and (come)............to his office