In fact, it has one-third of the world’s fresh water, and much of ___ is in the Great Lakes.
The first textbooks _____ for teaching English as a foreign language came out in the 16th century.
I can’t _____ you running up and down all day long.
Why do you have the water _____ all the time?
Deeply _____, I thanked him again and again.
_____ if he had any difficulties, he made no answer.