We should do what we can our environment.
--- Have you ever been to Paris, one of ________ cities in Europe? --- No. But one day I might go there on vacation.
What ______ you ______ when the telephone rang just now?
--- Could you please clean the room? --- _____ I have to do my homework.
—____ is she? —She’s fine.
—What’s that ____ English? —It’s a desk.