趙廣春

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個單詞）或括號內(nèi)單詞的正確形式。

What is a drone？ In general， a drone is a kind of flying robot that 1. ___ （control） by computers. While there are some kinds of drones called RoboBoats 2. ___ （design） for water， the most popular and well-known drone is the quadcopter. The four rotors （旋翼） of the quadcopter allow it 3. ___ （achieve） better balance.

Drones may become an important part of our daily lives in the near future. As drones become more developed and less expensive， 4. ___ number of uses for them continues to climb.

Drones can be used for difficult tasks such as weather monitoring or firefighting. They can also provide victims 5. ___ rapid disaster relief， search and rescue， and delivery of medical supplies. They are also being used to follow and study 6. ___ （animal）. Some drones can plant crops，

7. ___ （reduce） costs by 85 percent.

As drones become more inexpensive and easier to get， some fear that drones may change the world for the worse. Weaponized （武器化的） drones are already in production.

If you are interested in buying a drone， 8. ___ is necessary for you to learn about local laws for drone use. Drones are a 9. ___ （wonder） technology to enjoy， but owning one comes with responsibility. Ignoring rules could endanger you or others.

Perhaps the best summary of drone use is by innovator Raffaello D’Andrea： “Drones may be used to improve the human condition， or they may be misused. This is not a technical 10. ___ （choose） we are faced with—it is a social one.”

（Key ? p. 38）