按要求改句子。 1. I usually go to the supermarket on foot. (对划线部分提问) ____________________ 2. There are four hospitals in our city. (提问) ____________________ 3. Turn right at the traffic lights. (改为否定句) ____________________ 4. I’m on the bus now. (改为一般疑问句) ____________________ 5. There are many buses at the bus stop. (改为单数形式) ____________________