—I’m sorry that John is out. —Please ask him to call me as soon as he ____.
About _______ of the workers in the factory were born in the ______.
You can’t believe how terrible the fire is _______ you see it with your own eyes.
Driving in rush hour traffic ______ be very dangerous, so you _____ be too careless.
Jerry is always so busy that he can hardly _________ a few minutes to talk with his child.
---________ it is from our own planet Earth to Mars!--- Yes, it takes months to travel to Mars by spacecraft.