---Mary has been trained hard for the last two yearsshe did so well at the track and

---Mary has been trained hard for the last two years.
--- she did so well at the track and field meet yesterday.
A. No doubt
B. No question
C. No wonder
D. No problem

A. No doubtB. No question(答案→)C. No wonderD. No problem解析：考查交际用语：A项是没有怀疑，B项是没有要问(提问)的问题了 C项是难怪，D No problem是“没问题”，句意是：--过去两年玛丽一直受严格训练。--难怪她在田径比赛中做得这么好。选D。

感谢回答