用所给词的适当形式填空。 l. After a _____ (quickly) breakfast, he goes to school. 2. It took _____ (our) half an hour to get to the mountain. 3. Could you tell me some ways of _____ (learn) oral English? 4. He is new here. He needs _____ (buy) a map of the city. 5. How many _____ (minute) are there in an hour? 6. What about _____ (ride) a bike to the park? 7. He _____ (walk) home every day.