I know that it will be difficult to pick him out in such a crowd, but if you ________ happen to see him, give him this packet.
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?
Let's walk over ___the shop on the other side of the street.