There is no doubt you'll be warmly welcomed by people there.A. ifB. whetherC. thatD. abou

问题补充：

There is no doubt youll be warmly welcomed by people there.

A. if

B. whether

C. that

D. about

答案：

A. if

B. whether

(答案→)C. that

D. about

解析：考查同位语从句：doubt是同位词： that引导的是同位语从句， doubt本身被否定的话，其后跟的同位语从句应用that引导；doubt本身是肯定时，同位语从句则由whether引导，不能用if引导，句意：毫无疑问你会被那里的人欢迎的。选C。