1 . Mobile phones are everywhere in big cities. It seems that _________ can survive without one. Mobile phones are a great _________ to stay connected with friends and family. _________, it is important to remember that there are certain times _________ you should not be using your phone, especially as a student, during school.

_________ you are in class, you should not be sending your friends text messages _________ taking phone calls. Your classmates and teachers should not have to deal with this _________ behavior(行为) . Aren’t you at school to learn?

In the United States, students would never be allowed to _________ their mobile phones during class. If you were to send or _________ a text message you would probably be kicked __________ class. It is very disturbing to hear a lot of tones and ringing during __________. There are many more rules for mobile phone use in America and it is to __________ respect for those around you.

As a teacher in China, I have to __________ students using mobile phones every day. I have told my class to __________ their phones, but many students do not listen. __________ to be connected all the time seems to be more __________ than the desire to learn.

It’s easy to understand __________ it is so tempting(诱惑人的) to have your phone on during class. It seems so easy just to send a short text message; it’s not hurting anyone, is it? But you may actually be hurting __________ when you do this. Your teacher knows when you use your phone and may give you a __________ grade. Sending a text message also takes your attention away from what’s going on in class, you may __________ something important.

2 . 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.

3 . Jenkins was a jeweler (珠宝商), who had made a large diamond (钻石) ring worth ￡57,000 for the Silkstone Jewellery Shop. When it was ready, he made a copy of it which looked ___ like the first one but was worth only￡2,000. This he took to the shop, which _____ it without a question.

Jenkins gave the much more_____ring to his wife for her fortieth birthday. Then, the husband and wife _____to Paris for a weekend. As to the _____ring, the shop sold it for￡60,000.

Six months later the buyer _____ it back to Silkstone’s office. “It’s a faulty (有瑕疵的) diamond,” he said. “It isn’t worth the high _____I paid.” Then he told them the _____. His wife’s car had caught fire in an_____. She had escaped (幸免) ,______ the ring had fallen off and been damaged (损坏) in the great _____ of the fire.

The shop had to ______. They knew that no fire on earth can ______ damage a perfect diamond. Someone had taken the ______ diamond and put a faulty one in its place. The question was: who ______ it?

A picture of the ring appeared in the ______. A reader thought he _____ the ring. The next day, another picture appeared in the papers which ______ a famous dancer walking out to a plane for Paris. Behind the dancer there was a woman _____ a large diamond ring. “Do You know the ______with the lovely diamond ring?” the papers asked their readers. Several months later, Jenkins was sentenced to seven years in prison.