21. Caller: Hello, I'd like to speak to Mr. Lee at Room 1202.
Hotel Operator: One moment, please. _______________ ... I'm sorry. There's no answer.Would you like to leave a message?Caller: That's OK. I'll call back later.
(A) Let me connect you.
(B) Let me show you.
(C) Let me call you back.
(D) Let me contact you.