đề: viết lại câu dựa vào những từ có sẵn
1.David had gone home before we arrived.
⇒After.......................................................
2.We had lunch then we took a look around the shops.
⇒Before........................................................
3.The light had gone out before we got out of the often.
⇒When........................................................
4.After she had explained everything clearly ,we started our work.
⇒By the time.................................................
5.My father had watered all the plants in the garden by the time my mother came home
⇒Before..........................................................