【单选题】
This is the _____ mobile phone I want to buy.
【判断题】
A: Need I type this letter again? B: No, you mustnt.
【判断题】
A: Could I ask you a favor? B: Good idea.
【判断题】
A: Do you have the time? B: Of course, I have.
【判断题】
A: Hello! Are you John Smith? B: Yes, I am.
【判断题】
A: Hello, could I speak to Jack, please? B: Who are you?
【判断题】
A: Need you go yet? B: Yes, I need.
【判断题】
A: What can I do for you, sir? B: Nothing.
【判断题】
A: Could I speak to John, please?
B: No, you cant.
【单选题】
How stupid I have been! Why _______ I do that before?
