题目内容：
A、If too many people try to do the same thing at the same time, chaos will reign.
B、Empty-hearted persons are always the most talkative and noisy.
C、There must be something better after every piece of unpleasantness.
D、When two adversaries are of equal strength of character, the contest of wills is certain to be long and hard-fought.
参考答案：