题目

 David apologized for ______ to inform me of the change in the plan.    A. his being not able       B. him not to be able    C.  his not being able     D. him to he not able 答案：. C 解析: 介词for后应用动词的-ing形式，排除B、D；所有非谓语动词的否定词not都应加在非谓语动词之前，即not to do ,not doing, not having done, not done,故选C。下列不属于自强精神表现的是A．在困难面前不低头，不丧气 B．与同学闹矛盾不认输C．自尊自爱，不卑不亢 D．勇于开拓，积极进取