用括号内所给单词的适当形式填空。
1．Different people have different ________(hobby)，such as reading and watching films.
2．The children have much ________(schoolwork) every day.
3．My mother usually ________(cook) delicious food for us.
4．Those people had a ________(discuss) about this problem.
5．His uncle likes playing the piano and he wants to be a ________(piano)．