1
3 a lot of salt
4 OK
5 a lot of money (a fortune)
6 OK
7 many people
8 a lot
9 OK
10 a lot of money (much money is OK in my opinion too)
2
1 plenty of money
2 plenty of room
3 plenty to study
4 is plenty to see
5 there are plenty of hotels
3
2 little free time
3 many pictures
4 much to do
5 few old
6 little rain
7 many years ( much better - for ages)