问题
选择题
The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they ________.
A．were playing
B．were to play
C．had played
D．played
答案
答案：B
题目分析：考查时态：我们公司生产的电脑卖的最好，但是几年以后没有人能想象它曾经将在市场中扮演什么样重要的角色。were to do是过去将来时，表示过去想象电脑将会起到的作用。选B。