----Do you doubt she can run the race?
---- Yes, I doubt she can run against Liu Xiang
A. that; whether
B. whether; that
C. that; that
D. whether; if
网友回答
(答案→)A. that; whether
B. whether; that
C. that; that
D. whether; if
解析：doubt当动词时,在肯定句中后面可接if或whether。在否定句及疑问句中可跟that从句。I doubt if (或 whether) he will win. 我怀疑他能否赢。
I don''t doubt that he will win. 我毫不怀疑他会成功。Do you doubt that he will win? 你怀疑他会成功吗?故选A。