I doubt all the people invited will come to attend the ceremony in such bad weather.A. wh

问题补充：

I doubt all the people invited will come to attend the ceremony in such bad weather.

A. whether

B. that

C. how

D. what

答案：

(答案→)A. whether

B. that

C. how

D. what

解析：doubt指对事物的真、假有怀疑。它是动词时在肯定句中常与if或whether搭配使用。在否定句及疑问句中可跟that从句。有时在<肯定句>中也能跟that从句,但其含义是恐怕...不会。

它是名词时nodoubt后接that从句或介词of。

Wehavenodoubtthatyouwillsucceed.

Wehavenodoubtofyoursuccess.

我们毫不怀疑你会成功。

Thereis(Itis误)nodoubtthatyouwillsucceed.

毫无疑问你会成功。

How和 what都有词意，这个句子里不缺少它们的意思，故排除CD，所以选A。