The TVs made by our company sell best, but several years ago no one could have imagined the role m t

The TVs made by our company sell best, but several years ago no one could have imagined the role m the markets that they ________.

A.were playing

B.were to play

C.had played

D.played

答案及解析： B

句意是“……多年前人们想不到电视在将来会发挥的作用”，所以选择过去将来时。