--- Some people believe that robots will take over the world one day. --- What if that is the ______?
The doctor told him that it would be at least three more months ______ he could be released from hospital.
If I hadn't stood under the ladder to catch you when you fell, you ______ hospital now.
--- Many years has passed since I last saw you. I didn't recognize you at first.--- I , either, if someone hadn't called you by name.
According to the timetable,the next flight is here at 12 : OO, but the awful sandstorm, the whole airport has been closed.
It we had cooperated for a couple of weeks. I realized we had a lot in common.