3 . 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.

Everyone needs to know how to prevent a fire. It is also important to know what to do when it     1    （break）out .

Every year, over 11, 000 people     2    （kill）or injured in house fires. These fires could have been avoided. Smokers who are     3    （care）cause about 200 deaths and over 6,000 fires. More than half of those     4     die in fires are poisoned or harmed by smoke.

If fire happens, do not attempt to fight the fire unless it is small. Try putting out a small fire with water. If     5     fire has spread or if the flames are more than 20 inches high, shut the door on it. Warn everyone else in the building and tell them to get out. You should leave and dial 119for the fire department.

Before     6    （go）into a room, check the door. If the handle or the door is hot, do not open it! Instead, put clothing or a wet towel at the bottom of it to keep smoke out. If the door is not hot, open it     7    （slow）. If there’s a rush of smoke or heat, close it again and shout to warn     8    （other）in side.

Now open the window and shout “Fire!”. See whether you can drop safely to the ground. Use this     9     your escape course if you can. If you are not on ground level, break your fall by pushing a mat out first. Lower yourself at arm’s     10    （long）before dropping. Once outside, stay outside and make sure the fire department is called.