В некоторых из этих предложений much лучше заменить на a lot of.Correct the senteces or write OK.
1.I eat much sugar.
2.They don`t eat much meat.
3.Do you need much milk?
4.How much salt do you need?
5.There is much ham and much butter in my fridge.
6.There isn`t much salt in the salad. 

1. I eat a lot of sugar.2. They don`t eat much meat. OK.3. Do you need a lot of  milk?4. How much salt do you need? OK.5. There is a lot of ham and a lot of  butter in my fridge.6. There isn`t much salt in the salad. OK.