We live day by day, but in the great things, the time of days and weeks ______ so small that a day is unimportant.
If we the other road, we might have arrived here in time for the meeting. (2010 .陕西)
If you to see Mary, what would you tell her?
If the sea to rise 50 feet, India would become an island.
If you hadn’t gone with Tom to the party last night, .
I it to him if he didn’t understand.