Modern technology has made our economy _____efficient and competitive than the traditional one.
A、so much
B、many more
C、too much
D、much more
【正确答案】：D
【题目解析】：由句中的“than traditional one”可知改句为比较句，“efficient 和 competitive”的比较形式是其前加“more”,“many more”修饰可数名词，“much more”形容程度“更加，多得多”。此句话的意思是，与之前的技术相比，现代科技让我国经济的发展更高效更有竞争力。