I.
1. D /au/ # /əu/
2. A /s/ # /z/
3. C 1#2
4. D 1#2
5. B - would be ( câu điều kiện loại II : If there were …, there would be …)
6. B - amazed ( tính từ đuôi -ed) dùng cho người
7. B - possible ( make it adj to Vnt )
8. A I could speak
9. A were able to
10. D mặc dù
11. C ( S tobe adj enough to Vnt)
12. C S was/were VPII by O.