Questions 5 to 7 are based on the news report you have just heard. 5. A ) It stayed in the air for about two hours . B ) It took off and landed on a football field . C ) It proved to be of high commercial value . D ) It made a series of sharp turns in the sky . 6. A ) Engineering problems . B ) The air pollution it produced . C ) Inadequate funding . D ) The opposition from the military . 7. A ) It uses the latest aviation technology . B ) It flies faster than a commercial jet . C ) It is a safer means of transportation . D ) It is more environmentally friendly .