35. Whenever we disagree, our teacher always suggests that we 　　　　with each other.

A. quarrel　　　　　 B must quarrel　　　 C. debate　　　　　　 D. must debate

34. 　　　　all his words, the girl tried not to get angry.

　　 A. Although　　　　 B. Regardless of　　 C. Though　　　　　　 D. Regardless

33. We all felt it very difficult 　　　.

　 A. kept our words　　　 　 B. kept our word 　　C. to keep our words　　 D. to keep our word