----You must find one exam after another very tiring.---- ________. In fact, they offered me good chances to apply what I had learned.
Don’t leave matches or cigarettes on the table within _______ of little children.
Your composition is written very well ______________ some spelling mistakes.
________ makes mistakes must correct them.
We must take steps to prevent the __________ world population.
The amount of money that he saved reached _________ 30000 dollars.