Choose the correct answer. Use Present Simple, Present Continuous or Future Simple only:
a) I does/ do / am doing a lot of things every day.
b) She cooks / cook / is cooking at the moment.
c) They are having / is having / have a party on Sunday.
d) We will do / do / does this tomorrow.
e) He usually is buying / won't buy / doesn't buy modern clothes.
f) Look! The children will play / are playing/plays snowballs.