-May I trouble you with the question?-Sorry, but it is______my knowledge.
I have no idea if he________the meeting.
—When________again? —When he________, I'll let you know.
You should make it a rule to leave things________you can find them again.
After swimming in the sea, they came out of water and lay on the________for a rest.
If you want to change for a modern room, you will have to pay________$ 15.