—The speaker is a tall man with glasses.—Then it         be Mr. Smith, who is short and thin.

—Look at the sign! —Oh, I see.We _______ waste water.

—Whose purple coat is this?—It ____ be Lily’s. Hers is red. It _____ be Lucy’s. She likes purple.

 —I’ll call Bob and tell him the good news.—You __________ do that. He was here just now and heard it.

If you are in the zoo, remember not to touch or go near the animals. Although some of the animals are cute, you _________ leave them alone.