Daniel is the only one of the students in the class that never_____a mistake even when it is pointed out to him.

A．admit making

B．admits making

C．admit to make

D．admits to make

当网络图中某一非关键工作的持续时间拖延A，且大于该工作的总时差B时，网络计划总工期将______。

A．拖延A

B．拖延A+B

C．拖延A-B

D．拖延B-A