___ the Internet is bridging thedistance between people, it may also break some families or cause other familyproblems.
I ________to go for a walk,but someone called and I couldn’t get away
Children _______ sit in the front seat of a car. It’s too dangerous.
―I wonder _____ Shanghai is from New York.―It’s about 15 _______ flight.
Who _____ be phoning us at this time of night — It might be your sister.