问题
单项选择题
During the last few years, it has been realized that maintenance of programs is more expensive than development, so reading of programs by humans is as important as (67) them.
A．editing
B．writed
C．written
D．writing
答案
参考答案：D
解析：[分析] 在过去的几年里，人们已经意识到程序的维护比开发更重要，所以程序的易读性和程序的书写一样重要。