4а, 5d, 6d, 7c, 8a, 9c, 10a, 11d, 12d, 13c(хотя может быть и d), 14b, 15a, 16b, 17c, 18b, 19d, 20d, 21a, 22b, 23a, 24d, 25c, 26a, 27a, 28a, 29a, 30a
6
2 played ('a' is a vowel before 'y' so the 'y' doesn't change)
3 planned ('a' is a short vowel, so we write double 'n')
4 travelled ('l' at the end of verbs is always doubled)
5 opened (no need to double 'n' because the first syllable is stressed)
6 happened (the ending is -ed)
7 studied ('d' is a consonant before 'y', so the 'y' changes into 'i')
7
2 bought
3 chose
4 fell off
5 wore
6 wrote
1. Isn't, is
2. Are, 'm, am
3. 's, is
4. Are, aren't, 're
5. Is, 's
6. Are, 'm, am
7. Is, isn't, 's
8. Are, 're
9. Is, isn't, 's
10. Is, 's, isn't