The boy made the same mistakes __________,which,of course,made his parents very angry.[ ]

A．over and over again  

B．more or less

C．sooner or later  

D．here and there

经编针织机按照针床多少可以分为（）。

A.单针床经编机

B.钩针经编机

C.拉舍尔经编机

D.双针床经编机