This writer’s book sells ___.
—What should I wear for the party, darling?—_______.We're already late!
— Have you seen ____ pencil? I left it here this morning.—Is it _____black one? I think I saw it somewhere
The reading room needs _____, but it’ll have to wait until Saturday or Sunday.
The environment will be further polluted unless some measures _____.
—May I go out tonight?—Of course you can, _____ you promise to be back before 10 o’clock.