He gets （ ）when people don't understand what he’s trying to say.
A、defeated
B、frustrated
C、contaminated
D、exhausted
【正确答案】：B
【题目解析】：句意：大家都不理解他要说什么，他为此感到很受挫。defeat v. 击败，战胜 a defeated army 败军frustrate v. 使沮丧，挫败 Roberta felt frustrated and angry.contaminate v. 污染，玷污 The drinking water has been contaminated with lead. 饮用水被铅污染了。exhaust v. 使疲惫 exhausted a. 疲惫不堪的
