选择恰当的不定代词填空 everyone,something,nothing,anything,

选择恰当的不定代词填空 everyone,something,nothing,anything,
omeone.
1.Did George get _____on his birthday?
2.He looked back when he heard ___calling him.
3.It's all over .There's____to be afraidof now.
4.____in our class has to follow the school rules.
5.I want to do ____to help him.