问题补充：
I never doubt .
A. whether Tom has told me the truth or not
B. that whether has Tom told me the truth
C. that Tom has told me the truth
D. if Tom has told me the truth
答案：
A. whether Tom has told me the truth or not
B. that whether has Tom told me the truth
(答案→)C. that Tom has told me the truth
D. if Tom has told me the truth
解析：此题重点考查对语句结构的理解，根据语境选择C.
