线路速度120km/hA、800B、1400C、2000D、3200

阅读短文，根据短文内容，从短文后的五个选项中，选出能填入空白处的最佳选项。
Around the world more and more people are taking part in dangerous sports and activities._______ 小题1:_________---those who have climbed the highest mountains, traveled into unknown parts of the world or sailed in small boats across the greatest oceans.
_____小题2:______I would consider bungee(蹦极) jumping to be a good example of such an activity. You jump from a high place(perhaps a bridge or a hot-air balloon) 200 meters above the ground with an elastic(有弹性的) rope tied to your ankles. You fall at up to 150 kilometers an hour until the rope stops you from hitting the ground.______ 小题3:______ Other activities which most people would say are as risky as bungee jumping include jumping from tall buildings and diving into the sea from the top of high cliff(悬崖).
For the reasons, some psychologists explain that many people think their life in modern societies has become safe and boring. _________小题4:__________They had to go out and hunt for food, diseases could not easily be cured, and life was a continuous battle (战争)for survival.
Nowadays, according to many people, life offers little excitement. They live and work in comparatively safe conditions; they buy food in shops; and there are doctors and hospitals to look after them if they become ill.___ 小题5:__________

A. Not very long ago, people’s lives were constantly (持续的) in danger. B. Now, however, there are people who look for an immediate excitement from a risky (冒险的) activity which may only last a few minutes or even seconds.  C. The answer for some of these people is to look for danger in activities such as bungee jumping. D. Of course, there have always been people who have looked for adventure (冒险). E. It is said that about 2 million people around world have now tried bungee jumping.