When people think of tigers, words like" strong" and " dangerous" come into their mind. But now, the big animal is calling for our help. There were once eight kinds of tigers in the world, but three died out during last century. In the past 70 years, the number of Siberian tigers has gone from as many as 300 to somewhere between 18 and 22.

   World Wildlife Fund started a programme. It is about to put an end to tiger poaching(非法狩猎) and save wild tigers. China, together with 12 other countries, has joined in. The aim is to double the number of wild tigers in the next ten years.

According to the research by Chinese officers and WWF, the Siberian tiger is already one of the planet's most endangered animals. "If the government doesn't do anything, it's quite possible that there will be no more Siberian tigers in China in 10 to 20 years." said Zhu Chunquan, director at WWF Beijing office.

    Wild animals such as deer and wild bears are tigers' main food. The poaching of these animals is the greatest danger to tigers. Another one is the trap(陷阱). "Volunteers from WWF remove traps every year, but we cannot clear all the traps ourselves," Zhu said. The most important thing people can do is to save the animals tigers eat." To protect the tigers, we need to call on more people to stop hunting wild animals."

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When do children start to talk? If you ask a group of parents when this happened, most will say "around 12 months of age". They will probably, even remember what the children said. Many parents keep a diary of their child's "first words".

We can never predict(预测) what a first word is going to be. Often it's the name for "mummy" or "daddy", but it could just as easily be the word for an animal or a favourite toy. Everything depends on what has most caught the child's attention. But one thing is certain: after the first word, others come quickly. By 18 months, most children have learnt about 50 words. By two, the total has risen to around 200.

Early words are actually one-word sentences. One of the first features (特征) of language a child learns well is to control the rise and fall of the voice to make the difference between saying and questioning. In English, daddy with a high rising tone(声调) means "Is that daddy?" Daddy with a high falling tone means "There's daddy." Of course, only very basic meanings can be communicated using tones alone. So it soon becomes necessary to learn some grammar.

In English, grammar means learning to put words in different orders. Children have to see that mummy push is different from push mummy. They start practising such changes at around 18 months. By two, they have learnt the basic forms of word order, and we hear them saying such things as man kick ball and where daddy go.

What are the parents doing all this time? They're acting as teachers and they always have an active role to play in their child's language learning.

Last year, 61 companies in the UK took part in the world's largest test of a four-day work week. The results were so positive that 92% of the companies were planning to keep the new schedule. worried that they would get less work for their money, or that it could cause other problems. But the results of last year's experiment suggested the move might be good for both businesses and workers.

Last June, 61 UK companies agreed to try giving their workers a four-day work week. In return, they asked their workers to try to do as much in four days as they usually did in five days.

Many different kinds of businesses took part, including online stores, computer technology companies, advertising companies, and even a fish restaurant. Some companies were small, while others had around 1,000 workers

The companies found different ways of giving workers one more day off. Most companies simply gave workers Fridays off., Others chose Mondays, or had different workers take different days off. The experiment ran for six months, and turned out to be good for most businesses.

The number of days when workers were out sick dropped by 65%. On average,57% fewer people quit their jobs during the four-day work week trial. What's more, the companies made more money--about 1.4% on average.

How did workers do more in less time? Some companies cut meetings, or made sure they were shorter.0thers used technology to help workers get more work done quickly. Some companies created a "focus tie" so workers could work on just one thing without being disturbed.

In general, workers said the four-day work week made them feel less tired. About 71% said they felt less "burnt out‘' with their new work hours, and 39% said they felt less stressed. Most of the workers were more satisfied with the time they spent working.