TheExpo2010ShanghaiChinahasbeenasuccessfulevent.Ifit

問題詳情：

 The Expo 2010 Shanghai China has been a successful event. If it ______for one more week, we might have visited all the pavilions.

   A. continues       B. had continued     C. continued    D. has continued

【回答】

B

知識點：過去完成時及其被動式

題型：選擇題