21. —He can pass the driving test this time.
— _______.He did little pratice due to his busy work.
A. Mind your own business B. It's hard to say
C. Yes, I’m quite certain D. I can't agree more
22. — You shouldn't have made__ ______promise that you can never keep.
一 But I didn't want to lose ________ chance.
A. a, the B. the, a C. a, a D. a； /
