EX: dùng thì HTHT để viết lại câu
21. The last time we contacted was 3 months ago.
→ We ………………………….………………………………………………………
22. The last time she phoned her parents was ages ago.
→ She …..………………………………………………….……………………………
23. The last time she saw her elder sister was in 1999.
→ She …………………………………. …………………………………………………
24. I have never visited Ha Long Bay before.
-> This is ………………………………………………………………………………..
25. I have never eaten this kind of food
=> This ……………………………………………………………………..…………..