=>
I/
1. B ( by the time + qkđ, qkht)
2. C ( after qkht, qkđ)
3. D
4. B ( qkht + before + qkđ)
5. A
6. A
7. B
8. B
9. A
2/
1. Came / had finished
2. Had met
3. Went /had read
4. Hadn't worn
5. Had started
6. Listened / had done
7. Had gone /went
8. Left
9. Had finished
10. Forgot