Helicopters(直升飞机) are machines that fly. They are not like airplanes, though. Airplanes can go up in the air. They can land back on the ground. When in the air, airplanes can go forward. They can turn to the right or left. But they can’t go backward. Airplanes must move forward to be able to fly. They can fly forward very fast! If you’ re taking a long trip and want to get there quickly, airplanes are the best choice.
Helicopters can fly forward. They can also fly backward. They can even spin(旋转) in a circle! They can hover(盘旋) in one place, too. Airplanes can’t do that!
Helicopters don’t need a runway to take off and land. They simply go up and down! Unlike airplanes, helicopters don’t need large wings from the sides. They are much smaller, so they can land in small places.
Helicopters can do many jobs that airplanes can’t. They are used to lift heavy things or fight fires.
Helicopters can carry buckets of water. The pilot flies over a forest fire. He presses a button to dump the water onto the fire. Then he can fly over a lake or river. The helicopter can hover there and get more water. Then the pilot flies back over the fire to dump more water. Helicopters can also take firefighters to the fire. When they hover, the men can climb down a rope to get to the fire.
Helicopters can save people’s lives. They can rescue people trapped in a flood. They can be used as flying ambulances(救护车). Medical helicopters can land in a small place or on the roof of a tall building. They can fly the patient to the hospital quickly.
根据上面的短文内容填空。(每空不限一词)
66. When in the air, helicopters can
________, spin in a circle or hover in one place, while airplanes must move forward to be able to fly. So helicopters
________ airplanes.
67. If you want to take a long trip,
________ are the best choice because they can get there much
________.
68. It’s
________ for helicopters to have a runway to take off and land. Unlike airplanes, they can land in small places. Helicopters’ wings are so
________.
69. Many jobs can
________ by helicopters. People often
________ them to lift heavy things or fight fires.
70. According to the passage, helicopters are
________ used in many areas, they can
________ put out fire but save people’s lives.