阅读理解。 阅读下面短文，把A-D四个句子填入文中空缺处，使短文内容完整、正确，然后完成第1-5小题。 Once, a gentleman was traveling on a bus. He felt thirsty and got off at a station in search of water. However, before he got back to the bus, it left and he missed it. 1 He went to the nearby hotels to ask for a room but found none. At last he reached a hut (小屋). He asked the owner of the hut whether he could stay in his house for a day. The owner agreed. On that day the owner served him food and gave him a room to stay in, but did not ask for or expect anything in return. 2 The owner opened the door. A well-dressed man entered and asked the owner to pay his debts (债务). The gentleman came to know that the owner was in need of money. 3 When the owner saw the money, he found that there was also a note. It read,' 4 Yesterday I heard the conversation between you and the stranger and came to know that you were in need of money. This is what you need.' A. You helped me but did not expect anything from me. B. The man decided to find a place for a day's stay. C. The next morning he left some money on the table in the room and left. D. At night when it was about eight o'clock,the gentleman heard a knock at the door. 5. What does the passage mainly tell us? A. When you find others in need of money, give them some. B. When you help others, you are helped too. C. When you travel on a bus, don't get off before you reach the end. D. When you get help from others give them money in return.