I think ____necessary for us _____the birds.
)I’ll_________ advertisements after school so that we can tell people about the park clean-up.
)Beijing is one of the ______ in the world today.
) ______ used to ______ a post office near my house.A. There; be B There; have C. It; be D. There; having
)In the exhibition, all of us felt _________ to see so many _________ things.
)The boy likes music he can dance__________.