21. Hotel Clerk: Hello, Evergreen Hotel. May I help you? Susan: I'd like to reserve a room for two on the 21st of March. Hotel Clerk: Okay. Let me check our computer here for a moment. The 21st of May, right? Susan: _____ (A) No. March, not May. (B) Thanks for your help. (C) All set, now. (D) Ok, see you then.