WhenatHarvard,hespentalotoftimeimagininghowtheworld

問題詳情：

When at Harvard, he spent a lot of time imagining how the world ______ over the next 10 or 20 years．

       A．changed                                   B．has changed

       C．will change                                D．was going to change

【回答】

D

知識點：過去進行時及其被動式

題型：選擇題