21. All these changes will lead to _____stronger and powerful China, ____country that can surprise and enrich our planet.
A. a; the B. a; the C. a; a D. the; the
22. __________ straight on and you’ll see the church. You won’t miss it.
A. When going B. Going C. If you go D. Go
23. All her time _______ experiments, she has no time for entertainment.
A. devoted to doing B. devoted to do C. devoting to doing D. is devoted to doing
