21. —Would you mind if I turned off the radio?
—____It makes no difference to me.
A . Never mind B. Sure, go ahead C. Not at all D. Why not
22. He was ____by his brother.
A. brought up B.brought down C. brought in D.brought on
23.A dog____at his master's gate predicts the ruin of the state.
A. skilling B.stoping C. starving D.smelling
