A: Excuse me, can you spare me a few minutes?<br/><br/>B: <i>_____</i>?<br/><br/>A. What's up? B. What's the matter? C. What's it? D. Why?<br/><br/>A: Excuse me, can I ask you a question?<br/><br/>B: <i>_____</i>?<br/><br/>A. What's up? B. What's the matter? C. What's it? D. What?<br/><br/>By the way, can you tell me in what situation can we use the options respectively?