KCKO3-->A-->B-->H2SO4-->C-->D-->A

 Dạng viết lại câu với Hiện tại Hoàn thành:                                                          

1. This is the first time she has eaten eel soup.
= She has not……………………………………………………….……………………
2. She began to write 30 minutes ago.
= She has………………………………………………………………………………
3. They started studying English when they were in grade 3.
= They have…………………………………………………………………………………
4. I last saw him 3 weeks ago.
= I haven’t………………………………………………………………………………..
5. The last time I watched this movie was 6 months ago.
= I haven’t…………………………………………………………………………………
6. It is a long time since she last saw her parents.

= She hasn’t………………………………………………………………………..
7. When did you begin reading this book?
= How long have ………………………………………………………………………?
8. This is the first time I have been abroad.
= I haven’t……………………………………………………………………………
9. I haven’t gone to the zoo since last year.
= The last ………………………………………………………………………………………
10. I haven’t met my aunt since I was 10 years old.
=  I last ………………………………………………………………………………………

11. This is the first time she has worked with foreigners.
= She hasn’t………………………………………………………………………………………
12. She started to cry two hours ago.
= She has…………………………………………………………………………………….
13. We started to chat on the phone when it began to rain.
= We have…………………………………………………………………………………..
14. We got to know each other when we were at university.
= We have…………………………………………………………………………………..
15. The last time she phoned her parents was 3 weeks ago.
= She hasn’t………………………………………………………………………………..
16. It is a long time since we last went to this restaurant.
= We haven’t……………………………………………………………………………….
17. When did you have this laptop?
= How long …........................................................................................................?
18. This is the first time I have joined such an exciting party.
=I haven’t …………………………………………………………………………………….
19. I haven’t heard from her for many years.
= The last ……………………………………………………………………………………
20. The children haven’t been taken to the park since 2012.
= The last time ………………………………………………………………………………