There is no possibility I guess our exam will be put off.A. whatB. Which C. thatD. whet

问题补充：

There is no possibility, I guess, our exam will be put off.

A. what

B. Which

C. that

D. whether

答案：

A. what

B. Which

(答案→)C. that

D. whether

解析：考查同位语从句,用来解释possibility。