21. ---Do you mind my opening the window? It’s a bit hot in here.
--- _____, as a matter of fact.
A. Go ahead B. Yes, my pleasure C. Yes, I do D. Come on
22. This new model of car is so expensive that it is beyond the reach of those with _____ income.
A. frequent B. traditional C. extra D. average
23. He didn’t make ____ clear when and where the meeting would be held.
A. this B. that C. it D. those
