阅读理解。 Two friends were waiting at the bus-stop for the last bus but they were afraid that they had missed it. There were no cars passing by and not a single public telephone nearby to call for a taxi. They began to feel nervous. It was already late. What could they do to get home? Then, as they looked up, they saw a bus approaching them slowly. The last bus! They had not missed it after all. When the bus stopped at the bus-stop, the two young boys rushed up the bus in relief. Then, the bus started moving. Only after a few minutes did the boys realize that something was seriously wrong. Firstly, the bus was moving far too slowly. Secondly, there was no conductor to collect their fare. Thirdly, when they went to the front of the bus to check, there was no driver! With their hair standing on ends , they looked at each other with eyes wide open and started to scream. Then the bus stopped! The driver and the conductor appeared from behind the bus. They had been pushing it! 1. Why did the two friends feel nervous? A. It was very late at night. B. They had missed the last bus. C. They knew the last bus could not come. D. There seemed to be no way for them to get home. 2. What can we learn from the underlined part in the 5th paragraph? A. The boys were very frightened. B. The boys' hair was falling down. C. The boys felt extremely excited. D. The boys were wearing strange hair styles. 3. The bus was moving very slowly because _____. A. the driver was absent B. it was running out of petrol C. it was being pushed along by two people D. the two boys had not paid for their tickets