单选题：With his attention _____ the blackboard, he didn't notice m..

_____ catch the exam, the girl got up earlier this morning. [ ]A. In order toB. In order thatC. So as to D. So as that

_____ giving us a hand, he stood there laughing. [ ]A. Without B. Instead of 　 C. WhileD. Instead

I've never read a better book than this one. _____, it is the best one that I have ever read.[ ]A. Since then B. In other words C. At times D. In some ways

_____ all kinds of difficulties, the workers have made rapid progress in the construction of the World Expo 2010 Shanghai. [ ]A. With B. For C. Under D. Beyond

(2014·辽宁五校第一联合体考试)What impresses me most is________he appears in front of others，he wears a sincere and charming smile.A．what　B．whichC．that whereD．that whenever