The total number of tigers in many countries has greatly decreased these years.     1    the development of Asia, many lands have been divided up for roads, farms, factories, and so on.     2    , tigers are losing their natural habitats.     3    (hunt) who kill wildlife     4    for human consumption or for illegal trade have reduced numbers of deer and other animals,     5     (make) tigers’ food insufficient. Some roads allow people to     6     (easy) get close to places where wild tigers live. Tigers     7     (kill) for their fur, bones and other body parts, many of     8    are used as ingredients in medicines. Even though the sale of tiger parts is illegal, some people still take     9    (risk). In 1920, scientists     10     (figure) out that there were 100,000 tigers in the wild. But today the number is in the low thousands.

When you hear the word “shapeshifting” (变身), you may think of sci-fi movies, and not the climate. But that’s     1     animals are doing to deal with climate change. A new study shows that some animals are     2     (gradual) growing larger beaks, legs and ears. In this way they can lose heat more easily     3     (cool) themselves down as Earth gets warmer. “A lot of the time when we talk about climate change, we ask ‘Can humans overcome this?’ or ‘What technology can solve this?’ But we should know that animals also have to adapt     4     these changes,” said the study’s author Sara Ryding, from Deakin University, Australia. If animals fail to control     5     (they) body temperature, they can overheat and die. In one example, the beaks of some Australian parrot species     6     (grow) 4 to 10 percent larger since 1871. The study says it’s closely related to the     7     (rise) summer temperatures over the years. Similar examples include wood mice. They have longer tails, and bats in warm climates have bigger     8     (wing).

Although the changes are still small, Ryding said they could be     9     (obvious) as the days become hotter. “Body parts like ears are predicted to be bigger,     10     we might end up with a live-action Dumbo (big-eared elephant from a Disney cartoon) in the near future,” Ryding told BBC.

Le Le arrived at Chengdu Shuangliu International Airport from Singapore     1     Tuesday evening, becoming the first overseas-born giant panda to come to China this year. According to an agreement     2    (reach) between China and Singapore, Le Le was required to be sent to China this month. Singapore Airlines stated that     3    (ensure) Le Le’s safe journey, a Boeing 747-400F plane was used for the flight, with experts from both countries     4    (accompany) the panda.

During the flight, the cabin temperature     5    (maintain) at 12 to 16 degrees Celsius, and efforts were made to avoid turbulence (气流), ensuring a slow takeoff and landing to prevent any     6    (comfort) for Le Le. In addition, the aircraft carried 50 kilograms of fresh bamboo, bamboo shoots, carrots, apples and other food to meet Le Le’s dietary needs during     7     four-and-a-half-hour trip.

Unlike other overseas-born giant pandas     8     have been sent to China, Le Le won’t undergo quarantine (检疫) at the bases in Ya’an or Wolong. The China Giant Panda Conservation and Research Center said that the center’s facilities are not sufficient for the recent     9    (arrive) of overseas-born giant pandas coming into the country, so Le Le will use the quarantine facilities at the Huaying Mountain base.     10    (current), Le Le is in good health.

Over the past few years, scientists     1     (develop) a new artificial intelligence technology that can detect whether someone is lying through analyzing the muscles in his face.

Patches (贴片) placed on a person’s face detect muscle activity and then machine learning technology is used. The machine is able     2     (calculate) whether or not the person has been telling lies.     3     (invent) by Yael Hanein at Tel Aviv University in Israel, the machine showed success rate of 73 percent, implying it can catch liars with ease.

How would our facial expressions give     4     our lies? According to researchers from the University of British Columbia, Canada, some of the muscles in our faces change “behavior” when we are lying. Liars     5     (usual) raise their eyebrows. They also blink a lot and hold     6     (they) eyes closed longer.     7     (close) the eyes is a way to buy time for the liar so that they can better perfect their story.

Liars often blush (脸红). Blood flows into the cheeks as they become nervous about the     8     (true) possibly being revealed.

Liars also have fake smiles.     9     real smile often causes the eyes to light up or become smaller. This is because more muscles are used     10     we are happy. A fake smile is often accompanied by “dead” eyes instead.