Einstein like Bose’s paper so much that he ____ his own work and translated it into German.

A．gave off

B．turned down

C．took over

D．set aside

在正常钻进时，如水龙头、水龙带发生故障，绝不能将方钻杆坐在井口进行维修，如果一旦发生卡钻，将失去（）。