Is _______ three hours _______ the poor boy to come to school on foot?

s the long March Rocket 2F, as reported, sent Shenzhou VI spaceship into space.

_________ reading that book, takeit back to the library

The reasonhe didn’t go to school yesterday washe was ill．

I was riding along the street and all of a sudden,a car cut in and knocked me down— You can never be________careful in the street [ ]