The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they _____.

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 have played
D played
回答错误
你的答案:
参考答案:B
解析:B 故选项 B正确。