??? 情景例句
Well, when you called,
嗯， 你們打電話來時，
Work today, for you know not how much you may be hindered tomorrow.
今天有事今天做，明天可能事受阻。
Were you in San Francisco at the time of the big earthquake in 1989?
1989年舊金山大地震時，你在那兒嗎？