填入下面一段文字横线处的语句，最恰当的一句是顾炎武坚守民族气节，绝不仕清，所以终其一生只是一介布衣，平头百姓。____________，“拯斯人于涂炭，为万世开太平，此吾辈之任也”。他被人称为“通儒”、清代经学之祖。他的“经学”，不是空头讲章，不是纯学术理论，关键是“致用”。先己用，后他用，先利己，后利民，理论和实践相结合。我们社会不需要“百无一用”的所谓清高书生，缺少的恰恰是顾炎武这样的大才通儒。

She could be with her friend right now______at him.

Allen TV in the living room when I home yesterday.

Have you cleaned the room —Yes, I have. I have cleaned it up.

I was so familiar with him that I recognized his voice I pick up the phone.