American fast food seems _______(be) the most popular in the world.

If you want to cross a street, you _______(wait) for the green light.

My father came into the bedroom while I _______（dance）.

Would you mind _______（play）games after school?

Sam always ______（help）his classmates last term.

He _____（collect）300 pictures since 5 years ago.

I think there ________（be）fewer trees next year.

I’m very happy to _______ (meet) you.

The film is really _______ (fun).

Thank you very much for_______ (invite) me to dinner.