单项选择题
A. He won the first prize. B. He died because of fatigue. C. He fell behind the other runners. D. He gave up because he was tired.
A. drugstores B. department stores C. groceries D. supermarkets
A. more and more fresh water is used by farmers for their crops B. the amount of fresh water that can be used for crops decreases C. the earth will become warmer and warmer D. the ability to use fresh water sources becomes restricted