---Why do you think he can succeed?---He believes in himself, ____ is the most important, I think.
Many people agree that________knowledge of English is a must in________international trade today.
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.