1. How long have you come here? (1)
2. How long haven’t you come here ? (3)
3. Did you start coming here on Tuesday? (1)
4. Did you last come here on Tuesday? (3)
5. It is 30 minutes since they were on the phone (3)
6. She hasn’t finished her presentation for 1 hour (3)
7. Sam has run for 3 hours (1)
8. Was the last time she came here 2 days ago? (3)
9. Is it 2 months since I saw you? (3)
10. When did you start speaking English? (1)
11. When did you last talk about her? (3)
12. My students last called me in June. (3)
13. Have they been here since Wednesday? (1)
14. Did they start reading books at 9pm? (1)
15. Haven’t they read books since 9pm? (3)
Mình không hiểu đề bài cho lắm, bạn có thể viết lại được không??