1.
1) his/yours
2) them
3) Its
4) our
5) us/their
2.
1) knives
2) feet
3) potatoes
4) yours kitchens
5) her daughters in law
6) these children
7) those deer
8) women
9) mice
10) these pages
11) much money
12) those ships
13) knowledges
14) these news
15) glasses
16) girlfriends
17) hair
18) these countries
19) those tea-cups
3.
1) the most famous
2) better
3) older (elder)/more
4) the fattest
5) more nervous/less
6) worse
7) more expensive
8) intelligent