第1个回答 2012-06-15
I'm sorry.
I didn't get you./I'm lost.
Could you ask something else instead?/Could you change your question?
第2个回答 2012-06-15
Pardon,I couldn't get your point.Could you please shift to another question?
第3个回答 2012-06-15
Sorry, I don't understand, you can change a problem?