用括號(hào)中所給動(dòng)詞的正確形式填空，’使短文完整。

A drone (無人機(jī)) 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：無人機(jī)是一種遙控飛機(jī)，近年來，新技術(shù)使得無人機(jī)更便宜、更容易買到。無人機(jī)的使用對(duì)人類有有利的一面，同時(shí)也會(huì)給社會(huì)帶來很多問題。 1.句意： 近年來，新技術(shù)使得無人機(jī)更便宜、更容易買到。根據(jù)后文時(shí)間短語 in recen...
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