1. You'rе latе! Еvеrybody is waiting for you.
2. Everybody likes this singer. She's a very popular singer.
3. Don't worry about Jane. Everything is fine with her
Everything will be fine with her (Оба варианта подходят )
4. Everybody gives presents on New Year.
5. Nobody has(had) the answer to this question (Оба варианта подходят )
6. There's nobody in the house.