21.—Tony, where are the cookies? Don’t tell me you _________ them all! Again!
—Yes, I did.I couldn’t help it.They were so good.
A.had eaten B.ate C.are eating D.have eaten
22.—What experience most __________ who you are, Richard?
—My father let me play his guitar when I was three.Thirty-two years later, I still play.
A.proved B.impressed C.permitted D.shaped