听力原文： It was a hot afternoon in September 1963. A small party of engineers in a truck were exploring, looking for oil in the southeastern desert of Libya. They were about four hundred miles south of the Libyan coast. The desert was hot, dry, flat and empty. The air was very clear. The men suddenly noticed a strange shape on the horizon, far away. It was a mirage, they thought. Heat and light often played tricks on their eyes. The shape looked rather like an aero-plane on the ground. But the nearest landing ground, they knew, was at their own camp, a hundred and twenty miles to the north. As they drove slowly towards it, the shape grew dearer. It really did look like an aero-plane and seemed less than twenty miles away. Two hours later the party stood beside a wartime bomber. Her name, Lady Be Good, was painted in white letters below the cockpit. She was shining in the evening sunlight, and in some ways she looked almost new. The bomber had lost her wheels, and her propellers were bent. She lay fiat on the sand, but her body and wings were undamaged. The men opened a door… it opened easily…and went inside. The plane was shining inside, too. The controls, the radio, the instruments…all seemed perfect. In the small kitchen there were biscuits, tins of soup, and even some water in an airtight tank. Maps were lying on a table nearby. There were instructions to the crew and several radio reports, with dates. The dates were all in 1942. The visitors understood the tragedy of Lady Be Good. She had lost her way home, one night in 1942. She used up all her petrol and had come down in the desert. And there she had stayed for twenty-one years. She is still there. The dry, hot winds keep her clean. No rain ever falls on her in that desert. She may still be bright and shining in a hundred years' time. But what happened to her crew? The bones of five men were later found between thirty and sixty miles north of the bomber. The remains, including the remains of four parachutes, were widely separated. The men's names were written on small metal plates that hung down from the neck-bones. The story was clear. In case of a bad landing, the pilot had ordered his crew to jump by parachute. He himself had remained at the controls. The men had begun to walk to the north. But the desert had very quickly brought death to all of them. Questions: 11.When did the engineers find the plane? 12.Which of the following is true? 13.What did the fact show that Lady Be Good was still in good shape? 14.What did the engineers first think of the thing they saw? 15.What did the metal plates hung down from the neck-bones of the bomber's crew function? (31)