题目内容
用括号中所给动词的正确形式填空，’使短文完整。
A drone (无人机) is a remote-controlled aircraft that can carry cameras and some other things.
New technology1. (make) drones cheaper and easy to buy in recent years. More people use drones as a hobby, just like flying a kite. In Australia, drones 2. (use) to search large areas and protect animals. "You don't need 3. (worry) about getting attacked by crocodiles,"Dr Karen Joyce said.
But they may not be completely safe. There are more and more biologists 4. (use) drones and nobody really knows if they are causing harm to the animals (by scaring them).
One day, a drone 5. (crash) at a beach in the US, frightening visitors who were there .to take in the sunset.
Most countries have announced rules about where drones can fly. But there aren't many rules for hobby drones. "If drones become widely used in our society, there6. (be) a lot of problems," the lawyer Jennifer Lynch told us.
1.has made 2.are used 3.to worry 4.using 5.crashed 6.will be 【解析】短文大意：无人机是一种遥控飞机，近年来，新技术使得无人机更便宜、更容易买到。无人机的使用对人类有有利的一面，同时也会给社会带来很多问题。 1.句意： 近年来，新技术使得无人机更便宜、更容易买到。根据后文时间短语 in recen...
