C 16. B 17. C 18. D 19. A 20. B 21. -25 DCDAB 26-30 CACBD31-3...
Corn is a useful plant___ can be eaten by both human beings and animals.A. who B. what C. can’t D. shouldn’t( )10. --- Our basketball team ___ the match at last.--- Congratulations!A. joined B. won C. lost D. began( )11. --- ...