Ex 24
1. Billy's
2. Bob's
3. My grandparents'
4. Mrs Black's
5. The Blacks'
6. Mr. Smith's
7. Tom's
8.My friends' grandparents
9. sisters'
10. Porter's
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ex 25
1/ the biggest
2/ countries
3/ Zoos
4/ wolves
5/ bigger
6/ does
7/ going
8/ snows
9/ doesn't
10/ a wild