What could a chair say to deal with the situation when there is awkward silence? There are two proper expressions listed in the choices. Choose all of the correct answers.

A.May we hear now from some of the participants who haven’t expressed their opinions yet?

B.No more questions? No? Well, I think I’d like now to turn your attention to our next speaker.

C.We have gained, through your presentation, a much better insight into….

D.I think I’d now summarize briefly what has been said so far….

正确答案：May we hear now from some of the participants who haven’t expressed their opinions yet?；No more questions? No? Well, I think I’d like now to turn your attention to our next speaker.