The ability an idea is as important as the idea itself
A. to express
B. expressed
C. expressing
D. to cover
网友回答
(答案→)A. to express
B. expressed
C. expressing
D. to cover
解析：该句意思是：表达一个想法的能力和一个想法本身同等重要。Ability后面接不定式 to do something ，做定语，是惯用法，意思为做某事的能力。选A。