65、change 零钱(n.)换零钱(v.)

66、comfort v.& n 安慰;舒适，舒服

comfortable 舒服的，舒适的

67、have…in common 有共同之处

Although they are twins they have little in common.

68、communicate 传播，交流

69、compare…to… 把…比作…

compare…with… 把…与…相比

Poets like comparing their lovers to red roses.

Compared with brain，computer still has some shortcomings.

70、complain of/about 抱怨

71、be made up of 由…组成 be composed of consist of

72、concentrate on 集中注意力于 be engaged in

73、as far as…be concerned 就…而言

As far as wages are concerned，I'm very dissatisfied with the present job.

Concerning=about 关于

74、contribute 捐献 contribute to 有助于

Computers will contribute many conveniences to our work.

75、control out of control 失去控制 under 在控制之下

76、convenient 方便，便利的

77、convince 使相信/信服 convince…of…

I'm convinced(=I believe)that where there is a will，there is a way.

He was not convinced of his wife's guilty.

78、cope with deal with handle 处理，应付

79、at the cost of 以…为代价 He saved the drown child at the cost of his own life.

at the risk of 冒着…危险…

cost spend

The overcoat cost him $200.

He spent $200 on(in buying)the overcoat.