20．We　　　 the details of the plan time and time again to make sure the project went smoothly.

　　　 A．got through　　　　 B．got over　　　　　　　 C．went through　　　 D．dipped into

19．Perhaps that is the only point　　　 I completely agree.

　　　 A．that　　　　　　　　　　 B．which　　　　　　　　 C．with which　　　　　 D．where