Animal protection doesn’t begin and end with stopping poachers (偷猎者). Protection is the main area     1     dogs perform well. Dogs’ noses have the ability     2     (help) find live animals for natural surveys and observing programs, by finding various     3     (sign) animals leave.

Dogs provide important support in finding rare or     4     (threaten) wildlife—from koala and quoll in the Australian bush, to pine marten and crested newt in Britain’s countryside.

One of the world’s leading protection discovery dog trainers     5     (be) the non-profit Working Dogs for Protection. Co-founder Megan Parker was born in Missoula, Montana and has trained dogs     6     years to find scat (粪便), as one of the least harmful ways to find out where endangered species live and their numbers.

Smell detection has so far helped find populations of     7     fiercest predator (捕食者)—the killer whale—in the north eastern pacific and the     8     (rare) gorilla in the world—the Cross River gorilla—in the highland forests of Nigeria and Cameroon.

And now using the dog’s     9     (strong) is helping protectionists manage habitat for bears in the US Rockies and Yellowstone.

Protection by using the dog’s unbelievable smell abilities to preserve other species     10     (regard) as nature helping nature, but it is a solid fact that these specialized wildlife dogs are here to stay.

You may remember back at the start of December,     1     China carried out their unmanned Chang’e-5 mission and the spacecraft touched down on the moon to collect samples for research. Now it     2    (success) returned to the Earth. This is the most significant event in China’s space field, and also one of the most notable space     3    (activity) globally. Chang’e-5,     4     (launch) by a Long March 5 heavy-lift carrier rocket early on Nov 24, is the nation’s     5    (large) and most complex lunar probe. It returned with 1,731 grams of lunar rock and soil to the Earth,     6    (mark) a historic accomplishment 44 years after the last lunar substances were taken back. The 23-day mission was China’s first space journey to claim extraterrestrial samples, making     7     the third country to accomplish the task, the first being the USA in the 1960’s and the second Soviet Union in the 1970’s.

The spacecraft     8    (enter) the Earth’s atmosphere at an altitude of around 120km. As soon as it was 10km above land, it released its parachute and landed smoothly in China's Inner Mongolia. Now the spacecraft has been air lifted to Beijing where the samples     9    (examine) by scientists very soon.

The mission’s results will contribute     10     mankind’s deeper understanding of the moon’s origins and the evolution of the solar system.

Scientists have discovered a special link between music     1     cheese. Different kinds of music affect the way cheese matures(发酵).    2     (look) into the influence music had on the maturation process of Emmental cheese, a top Swiss cheese-maker and a team of researchers from the University of Bern in Switzerland carried out a six-month test. After the cheese had matured, it     3     (assess) by the researchers and cheese experts. The researchers found that cheese     4     had been exposed to hip-hop had a     5     (strong) flavor than others. And the cheese lovers reached a similar     6     (conclude) that the hip-hop cheese was the tastiest.

The experiment,    7     (title) “Cheese in Surround Sound”, involved     8     (expose) different cheeses to a 24-hour, non-stop musical loop(循环播放). A music player directed sound waves at the cheese for six months. The music included classical, rock and hip-hop. A researcher explained the differences in the taste of the cheese. He said, “Bacteria are responsible     9     the formation of the taste of cheese as well as its maturity. I am convinced that humidity (湿度) temperature or nutrients are not the only things that influence taste. Music or sounds     10     (obvious) influence the taste of cheese, too.”

Then what is causing the increase in the global average surface temperature? Climate scientists often mention a key climate process    1    (call) the “greenhouse effect”, which has two common meanings: the “natural” greenhouse effect and the “man- made” greenhouse effect. The “natural” greenhouse effect     2    (refer)to the fact that heat from the sun enters the atmosphere and warms Earth’s surface as short-wave radiation. The heat is released back into space at longer wave lengths. Greenhouse gases in the atmosphere, such as methane carbon dioxide, trap some of the heat,     3     (keep) Earth’s climate warm and habitable.

    4     this process, Earth could not sustain life. However, the “man-made” greenhouse effect has now become a big problem.