Imagine that you're looking at your company-issued smartphone and you notice an e-mail from Linkedln:“These companies are looking for candidate like you!” You aren't necessarily searching for a job, but you're always open to opportunities, so out of curiosity, you click on the link. A few minutes later your boss appears at your desk. “We've noticed that you're spending more time on Linkedln lately, so I wanted to talk with you about your career and whether you're happy here,” she says Uh-oh.

    It's an awkward scene. Attrition(损耗) has always been expensive for companies, but in many industries the cost of losing good workers is rising, owing to tight labor markets. Thus companies are making greater efforts to predict which workers are at high risk of leaving so that managers can try to stop them. Methods range from electronic monitor to sophisticated analyses of employees' social media lives.

    Some of this work may be a reason to let employees to quit. In general, people leave their jobs because they don't like their boss, don't see opportunities for promotion or growth, or are offered a higher pay; these reasons have held steady for years.

    New research conducted by CEB, a Washington-based technology company, looks not just at why workers quit but also at when. “We've learned that what really affects people is their sense of how they're doing compared with other people in their peer group, or with where they thought they would be at a certain point in life, says Brian Kropp, who heads CEB's HR practice. “We've learned to focus on moments that allow people to make these comparisons.”

    Technology also provides clues about which star employees might be eyeing the exit. Companies can tell whether employees using work computers or phones are spending time on (or even just opening e-mails from) career websites, and research shows that more firms are paying attention to these things. Large companies have also begun tracking badge swipes(浏览痕迹)—employees' use of an ID to enter and exit the building or the parking garage—to identify patterns that suggest a worker may be interviewing for a job.

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    Mark and his brother Jason both were looking at the shining new computer enviously. Jason was determined not to go against their father's wishes but Mark was more adventurous than his brother. He loves experimenting and his aim was to become a scientist like his father.

     “Dad will be really mad if he finds out you've been playing with his new computer” Jason said, “He told us not  to touch it.”

     “He won't find out,” Mark said, “I'll just have a quick look and shut it down.”

    Mark had been scolded before for touching his father's equipment. But his curiosity was difficult to control and this new computer really puzzled him.

It was a strange-looking machine — one his dad had brought home from the laboratory where he worked. “It's an experimental model,” his father had explained, so don't touch it under any circumstances.” But his father's warning only served to make Mark more curious. Without any further thought, Mark turned on the power switch. The computer burst into life and seconds later, the screen turned into colours, shifting and changing, and then two big white words appeared in the centre of the screen: “SPACE TRANSPORTER.”

     “Yes!” Mark cried excitedly, “It's a computer game. I knew it! Dad's only been pretending to work. He's really been playing games instead!” A new message appeared on the screen:

“ENTER NAMES

VOYAGE 1

VOYAGE 2

    Mark's finger flew across the keyboard as he typed in both of their names.

“INPUT ACCEPTED.

START TRANSPORT PROGRAM.

AUTO-RETRIEVE INITIATED( 自动回收程序已启动).”

    The screen turn even brighter and a noise suddenly rose in volume.

     “I think we'd better shut it off, Mark,” Jason yelled out in terror, reaching for the power switch. A beam(光束) of dazzling white light burst out of the computer screen, wrapping the boys in its glow(光芒)，until they themselves seemed to be glowing. Then it died down just as suddenly as it had burst into life. And the boys were no longer there. On the screen, the letters changed：

“TRANSPORT SUCCESSFUL．

DESTINATION:  MARS.

RETRIEVE DATE:  2025

A

    About three hours after Hurricane Harvey made landfall in Texas as a Category ( 级 别 ) 4 storm, it was downgraded to a Category 3 storm after winds decreased to 125 mph from maximum winds of 130 mph.

    Harvey also made a second landfall on the northeastern shore of Copano Bay around the time it was downgraded.

    The storm is the strongest to hit the state in decades, with serious flooding expected. The last Category 4 storm to hit the U.S. was Charley in 2004 in Florida, while the last Category 4 storm to hit Texas was Carla in 1961.

    Residents staying in the area madly stocked up on(备足) food, water and gas, while others heading out of the storm's path boarded up windows and doors of their homes and businesses.

    Airlines canceled flights, schools were closed while concerts and other planned events in Houston and coastal cities were postponed.

    The hurricane's effects are expected to last for days, with heavy rainfall through next week estimated to be as high as 40 inches in some areas.

    The National Weather Service warned Harvey could bring a potentially destroying storm surges( 风 暴 潮 ), heavy rainfall and wind hazards( 危 害 ) to the Lone Star State's coast. A tornado watch is in effect for areas of southeastern Texas and southwest Louisiana.

    Life-threatening storm surge waters could reach 9 to 13 feet above ground level. Destroying flooding is expected across parts of the area. And rainfall will be heavy, with an estimated 15 to 30 inches of rain falling in many areas and as high as 40 inches in some from today through Wednesday, the National Weather Service said.

    A business executive（主管）was deep in debt and could see no way out. He sat on the park bench, head in hands, wondering if anything could save his company.

    Suddenly an old man appeared. “I can see that something is troubling you,” he said. After listening to the executive's words, the old man said, “I believe I can help you.” He asked the man his name, wrote out a check, and pushed it into his hand saying, “Take this money. Meet me here exactly one year from today, and you can pay me back at that time.” Then he turned and disappeared as quickly as he had come.

    The executive saw a check for $ 500,000, signed by John D. Rockefeller, then one of the richest men in the world! “I can settle all my debts immediately!” he realized. But instead, the executive decided to put the uncashed check in his safe. Just knowing it was there would give him the strength to work out a way to save his business, he thought.

    With renewed optimism, he made better deals and extended terms of payment. Within a few months, he was out of debt and making money once again. Exactly one year later, he returned to the park with the uncashed check. At the agreed-upon time, the old man appeared. But just as he was about to hand back the check and share his success story, a nurse came running up and grabbed the old man.

    “I'm so glad I caught him!” she cried.” hope he hasn't been bothering you. He's always escaping from the rest home and telling people he's John D. Rockefeller.” And she led the old man away. The astonished executive just stood there.

    Suddenly, he realized that it wasn't the money, real or imagined, that had turned him around. It was his newly found self-confidence that gave him the power to achieve anything he went after.

    If you want to fully enjoy your vacation, you'd better check the Durban City Tours! This is actually one of the best choices in South Africa today.

    There is nothing more relaxing than to think about that there is a place to go and relax, right? City life is strained（紧张的）, but you can escape this situation and be in the place where there is nothing but relaxation. Here in Durban you will get to see all the amazing tourist attractions（吸引人的地方）. If you love animals and want to see some elephants wandering around the streets, then Durban is the place to go. You can even get to ride one if you want!

    Here you will also get to taste all the delicious South African food. You can choose from Italian cooking to its native dishes. Durban is a great place to tour with your friends and family. You will learn a lot about its history through the landmarks（地标） you will see down the streets. Tourists and even the local villagers just can't get enough of these treats!

    However, it is important that you make the necessary arrangements安排. There are actually lots of tour guides that will help you as you make your journey along the streets of Durban. But if you prefer the best tour guides here in Durban, then you'd better choose the Street Scene Tours. Their staff（员工） are all well­trained and professional（专业的）. They will certainly make your stay here an unforgettable one. No wonder tourists prefer the Street Scene Tours when it comes to Durban City Tours.

The outbreak of locusts, an insect that mainly lives in Africa and Asia, is the worst experienced by Kenya in 70 years. The crowds are some three times the size of New York City, eating their way through thousands of acres of crops and animal grassland and destroying livelihoods in the process.

"These hungry things are alarming," says Keith Cressman, the UN Food and Agriculture Organization's senior locust forecasting officer. "A crowd the size of Manhattan can, in a single day, eat the same amount of food as everyone in New York and California combined."

Desert locusts are infamous for their ability to breed(繁育)rapidly in large numbers every three months. And with some help from the wind, they can travel as much as 80 miles a day. Most years, the insects stay in African deserts. However, under the right environmental conditions, they can multiply quickly, spread as much as 400 times every six months and cause extensive destruction if left unchecked.

"The insect has the ability to take advantage of good conditions." Cressman says.

The "good conditions" the scientist is referring to began in mid-2018 when a rainstorm from the Indian Ocean struck a remote area of the Arabian Peninsula known as the "Empty Quarter". Normally, it would dry out within a short period, killing most of the locust population, which depends on green plants for food. However, in late 2018, a second rainstorm struck the same region. The huge sandy area got wet, which is exactly what desert locusts need to lay their eggs and breed. The extra food supply caused the population to explode for the second time in six months.

Luckily, the locusts, experts say, are easy to control with chemicals. Kenya badly needs equipment and a steady supply of chemicals to effectively wipe out the massive insects. Hopefully, leaders worldwide will recognize the tough situation and contribute generously to control the locust outbreak.