单选题 Customer: Excuse me, sir.
Clerk: ______.
Customer: I'd like to cash a check. Would you please tell me which window should I go to?
Clerk: You can cash checks over there at window 6.

A、 What? Can I help you?
B、 Yes, may I help you?
C、 It's all right.
D、 It doesn't matter.

【正确答案】 B

【答案解析】[注释] 顾客要求服务，空白处是店员的回答。A不太礼貌；C，D把顾客的Excuse me， sir．错当作“请求原谅”来回答；只有B．Yes, may I help you?正确。