英语演讲比赛中的即兴问答,如果一时之间想不到答案,

如果问题清楚,但是要思考一下的话,可以说
I think it's a little difficult for me now,but I will try to give the best answer to you.
如果是没听清楚问题,希望对方解释一下,可以说
The question maybe a little abstract,can you give me more imformations about it?
如果只是需要重复的话,尽量不要用Pardon?而是直接说
I'm awfully sorry that I didn't catch your words exactly,can you repeat it again?

let me see, wait a minute, anyway~````````, whatever,,,,,,,

May be you can answer the questioner .. EXCUSE ME ..SIR/MDM ... WOULD U MIND TO REPEAT YOUR QUESTION ONE MORE TIME.... or SORRY ....SIR/MDM .. CORRECT ME IF I AM WRONG .... THE QUESTION U HAVE ASKED ME JUST NOW IS IT PERTAINING ABOUT ....... !

需要再说一遍，最好用please pardon.这样比较口语化，而且简洁明了。要延长就用，in my opinoin,或者diffrent people have different idea,to me ,it's.....