We ___have hurried all the way to the airport—the flight was called off because of the foggy weather. 

 “Mike is often absent from class.” “Tell him he _________ answer for it if he goes on behaving like that.”

--The room is so dirty.____ we clean it? ---Of course.

The president desires that you _________ him next week.

I got up early that morning, but I _____ so because I had no work to do.