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 playingB．were to playC．had playedD．played

B

解析試題分析：考查時(shí)態(tài)：我們公司生產(chǎn)的電腦賣的最好，但是幾年以后沒有人能想象它曾經(jīng)將在市場中扮演什么樣重要的角色。were to do是過去將來時(shí)，表示過去想象電腦將會起到的作用。選B。
考點(diǎn)：考查時(shí)態(tài)

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