Eric is so careful that he always looks over his exercises to ________ there are no mistakes.
Lucy spends plenty of time singing, so she can sing ______ than her sister Lily.
—Have you found the information about famous people ______you can use for the report? —Not yet. I’ll search for some on the Internet.
—When shall we go and play basketball? —Not until the work _______ tomorrow.
—Driving less and walking more is good for our health. 一So I’d rather ______ an hour's walk to work than consider _____ a car.
The project they’re working on ________ many teenage problems that they care about.