There is no doubt my friend is not satisfied with what they have done.A. thatB. whetherC.

问题补充：

There is no doubt my friend is not satisfied with what they have done.

A. that

B. whether

C. if

D. why

答案：

(答案→)A. that

B. whether

C. if

D. why

解析：考出固定句型，There is no doubt that…意思“…毫无疑问”，句子意思“毫无疑问我的朋友不满意他们所做的”