— Do you know everyone at the party? — Almost, but I don’t know the one you talked with at the door.
I don’t know if hetomorrow. If he, I’ll tell him about it.
We can’t work out the physics problem. Can you tell us ____?
This question sounds _____ than that one.
Health is very _____and every student knows the _____of keeping healthy.
Our country _______ a lot in the last fifty years.