综合类考试：经典高频词汇及同义词
46 / childish / immature / 幼稚
47 / china / porcelain / 瓷器
48 / collaborating / cooperating / 合作
49 / collide with / run into / 碰撞
50 / compactly / densely / 密集地
51 / compel / force / 迫使
52 / complain / feel unhappy / 抱怨
53 / comprehend / understand / 理解
54 / confidential / secret / 秘密
55 / consolidate / strengthen / 巩固
56 / contaminate / pollute / 污染
57 / continuously / steadily / 稳定地
58 / conventional / orthodox / 传统的
59 / copy / duplicate / 复制
60 / coverage / reportage / 覆盖；新闻报道