--- I think the waiter has forgotten us. We ________ here for over half an hour! --- I think you’re right. He probably thinks we have already ordered.
Why these things happened was ____ the driver had been careless.
They had camped once before, ____ they knew what to take.
____ you are dismissed.
He is very old,____ he still works very hard.
---You are so lucky. ---What do you mean ____that?