The ability an idea is as important as the idea itself.
A. expressing
B. expressed
C. to express
D. to be expressed
网友回答
A. expressing
B. expressed
(答案→)C. to express
D. to be expressed
解析:本题考察非谓语动词作定语的用法。Express 修饰的是ability, 为主动关系,所以答案锁定在A,C之间;ability作为一个抽象名词,通常使用动词不定式做定语;当然我们还可以联系短语be able to do sth,不难推断正确选项为C