Once an Arab was traveling in the desert . When the sun went down in the west , he stopped and put up his tent , made a fire and had a 36 meal . When night fell , he 37 down to sleep . He had 38 fallen asleep when he felt a soft 39 on his elbow(肘) . He woke up to find that his camel had put his head inside the tent . The camel said , “Would you please let me keep my head in the tent to get warm ? It’s so cold outside . I won’t take up much room . ” The Arab was a 40 man . “All right ,do as you please , ”he said . Then he turned on his side and went b6.A.In a bank. B.At an airport. C.At a station. D.In a post office.