问题
选择题
Beijing ______a lot in the past ten years. Now it has become one of the biggest modern______ in the world.
A．changes, cities
B．changed, city
C．changed, cities
D．has changed, cities
答案
答案：D
题目分析: 句意:在过去的十年里北京变化很大。现在北京已经变成为世界上最大的现代城市之一。根据in the past ten years在过去的十年里，可知时态为现在完成时；one of 之一，后接名词复数，故答案选D.
