The police have begun an ______ into the accident which happened this afternoon.
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
The pool should not be made so deep______small children can be safe there.
She asked me______I was looking at.
According to critics of globalization, several developed countries have become rich because of
_______ has been a topic of continual geological research.
Long ago, women were_________to vote in political elections.
The examination was not very difficult, but it was_____________________ long.
Stephanie: "Oh, no! I left my book at home. Can I share yours?" Scott: "______ "
We all agree that she is____________________ student in our class.
The phrase "keeps sellers on their toes" in the passage mostly means "______".