【简答题】Imagine one day the water taps (水龙头) in your house stop running. You have to pay a lot of money to buy water from shops. And still there isn’t enough water for everyone. Your mother has to save the fa...
【单选题】Imagine this: Your father has been stricken with serious heart disease. At the hospital, you learn he has a chance to survive--- if he can receive a heart transplant. But there are no heart donors ava...