Before he was 20, he developed ______ for the personal computer.
He_______________us but he was short of money at the time.
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
_______ has been a topic of continual geological research.
We all agree that she is____________________ student in our class.
Stephanie: "Oh, no! I left my book at home. Can I share yours?" Scott: "______ "
Regular exercise and good diet will bring______fitness and health.
______ his brother, Mike is active and friendly.
There has been a great increase in retail sales,_____________________ ?
The boat was sailing north when a terrible storm_____________ .
The pool should not be made so deep______small children can be safe there.