cíu á á á ét ô ét
----- Nội dung dịch tự động từ ảnh -----
1. After they had eaten the shellfish, they began to feel sick.
-> Before ...
2. Before they arrived at the airport, they had paid the taxi driver.
-> After ..
3. The light had gone out before we got out of the office.
→ When ....
4. After she had explained everything dearly, 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 ...
6. When I arrived home, my mother had tried to call me.
-> Before ...
7. David had gone home before we arrived.
After ....
8. I had had a cup of tea before I left for my office. -> After ..