Maybe he wants to go ____________ (skate).用适当形式填空

Maybe he wants to go ____________ (skate).用适当形式填空
there are seven __________(hundred）people on the ground.
where do you think Sally _______(work)ten years from now?
the boy ___________(fly) to New York two days ago ,and he ________(be)back soon.
________(be) you at school yesterday evening?we had an exciting party.
when I grow up I ______________(be) a famous pilot