I.
/əʊ/: boat, coat, note, phone, bone, boat, raincoat, nobody, yellow, whole, pagoda.
/ai/: tonight, time, riding, nice, typewriter, dine, child, bike, shy.
IV.
1. since
2. for
3. for
4. since
5. for
6. since
7. for
8. for
9. since
10. for
11. for
12. since
13. since
14. for
15. for
16. for
17. since
18. for
19. for
20. since
VI.
1. C
2. B