1 . On Thursday morning, two teenage boys were rescued by a drone (无人机) in Australia while lifeguards were still training to use the machine.

The ________, aged 15-17, got into difficulties about 700 feet off the coast of Lennox Head, New South Wales (NSW). A passer-by saw them ________ in dangerous waves. Lifesavers ________ sent the drone to drop a lifeboat, and the pair made their way safely to the ________.

The drone, known as “Little Riper”, was actually not ________ to be saving anyone just yet—lifeguards were being trained to ________ the machine. When a call came through about the swimmers in ________ the drone happened to be nearby.

Jai Sheridan was the lifeguard who ________ the drone. He described the experience as ________. “The Little Ripper ________ proved itself today. It is a highly efficient piece of lifesaving equipment. I was ________ the drone when the alarm was raised. I directed it towards the swimmers and dropped the ________. With its support they made their way to safety. They were ________, but not hurt. The teens were saved in just 70 seconds with the drone—while a lifeguard would have taken up to six minutes to ________ the rescue.”

John Barilaro, an official of the state,________ the rescue as historic. “It was the world's ________ rescue by the unmanned airplane,” he said. “Never before has a drone been used to ________ swimmers like this.”

Last December, the NSW state government ________ some “Little Ripper” drones for 247, 000 pounds.________ some are designed to spot sharks, others are ________ with lifeboats, alarms and loudspeakers. “It was money well spent,” said John Barilaro.