问题
选择题
We are sure everything here____ by the time you come back from abroad in a few years.
A．had changed
B．will have changed
C．had been changed
D．will have been changed
答案
答案：D
考查时态。句意：我们相信这的一切事情，在你几年后从国外回来时能够全部改变。结合语境可知从句描述的是将来某个时刻完成的动作，用将来完成时态，everything是被改变的对象，故用被动语态，选D。
