--- Do you doubt he’ll be fired by the school?
--- No, not a bit. But I doubt he will bury himself into study.
A. that; that
B. whether; /
C. if ; that
D. that; whether
网友回答
A. that; that
B. whether; /
C. if ; that
(答案→)D. that; whether
解析：考查doubt的用法;在否定句和疑问句中，doubt后面接that引导的宾语从句。在肯定句中，doubt后面一般接whether或if引导的宾语从句。句意：你怀疑他会被学校开除吗？--不，一点也不，但我怀疑他是否会埋头学习。选D。