I doubt he will come to attend our school’s 107th anniversary ceremony.A. thatB. whetherC.

问题补充：

I doubt he will come to attend our school’s 107th anniversary ceremony.

A. that

B. whether

C. what

D. how

答案：

A. that

(答案→)B. whether

C. what

D. how

解析：考查定语从句。动词doubt，说明后面是指不确定的事情，那么应该使用whether;句意：我怀疑他是否会参加我校107年校庆典礼。