Task 1:
Countable: oranges, apples, bananas, crisps, problem, salad.
Uncountable: meat, sugar, stress.
Countable and uncountable: fish, fruit, chocolates.
Task 3:
oil (u), cakes (c), biscuits (c), potatoes (c), meat (u), chicken (u), fish (u), rice (u), pasta (u), yoghurt (u), vegetables (c), fruit (u), juice (u)