Many people have dogs in their homes. Dogs are very affectionate animals. They are also very sensitive to the feelings of the people with 【小题1】 they live, and it seems quite 【小题2】 (nature) to have them in our houses. Maybe some people are 【小题3】 (puzzle) by the great similarity between dogs and wolves. Some scientists hold the 【小题4】 (believe) that many different types of dogs come from one species of animal—the grey wolf. These wild animals came into villages 12000 years ago, looking for food and 【小题5】 (get) rid of hunger. People discovered that wolves could help in the daily struggle for survival 【小题6】 preventing their homes from being disturbed(打扰) by other animals and hunting wildlife to kill and eat. 【小题7】, people kept them in their homes to make them accept the human care and reduce the wolf nature. Today in some very old parts of Northern Canada, the skin of some very old dogs 【小题8】 (be) still used to make warm clothes. Dogs are useful, and many people are 【小题9】 (satisfy) with dogs and love them—that is 【小题10】 they are often called “man’s best friend”.

Every day, Duan Lianru spends several hours sitting in her office in Hunchun, Jilin province to make a 【小题1】 (compare) of hundreds of photos of Siberian tigers on the computer.

“It seems a little boring, but 【小题2】 (basic) I enjoy the work, which makes a connection between me and the big cats,” said the 36-year-old monitor from there search monitoring center of the Northeast China Tiger and Leopard National Park. The park 【小题3】 (stretch) across the provinces of Jilin and Heilongjiang.

Duan is responsible for identifying the tigers according to patterns on 【小题4】 (they) fur and giving them something like 【小题5】 identity card.

The park, 【小题6】 size exceeds (超过) 1.4 million hectares, is the most important habitat for wild Siberian tigers and Amur leopards in China.

The Siberian tigers’ “ID cards” come 【小题7】 a lot of important basic data that aids scientific conservation. 【小题8】 (base) on such information, Duan draws the family trees of the tigers.

Recent years 【小题9】 (see) a remarkable increase in the variety and number of wild animals and more tiger families have been found, including some back two or three generations.

“I feel quite honored to be involved in such significant work.” Duan said. “ 【小题10】 (create) a more beautiful world, humans and wild animals, I hope, can live in harmony.”

Do you like eating insects? In the past decade, insects 【小题1】 (become) a familiar sight on dinner tables. One reason is that people are concerned about the environment. Traditional livestock farming is harmful 【小题2】 the environment as it is generally unsustainable. Raising insects is much more environmentally friendly. One kilogram of insect protein needs about 10 percent of the feed, water and land used to produce the same amount of beef. 【小题3】 (expert) say farming insects is better for the environment than raising livestock. 【小题4】 reason why we may have to eat insects is that the world's population is increasing 【小题5】 (rapid). By 2050 this is expected 【小题6】 (be) 9. 8 billion, up from the current 7. 7 billion.

The insect farming industry is growing quickly. There are hundreds of companies worldwide creating meals 【小题7】 (make) from insects. There are stores in Tokyo, Japan, 【小题8】 you can purchase a can of insect snacks. The menu includes dried tarantulas and scorpions. However, not everyone is 【小题9】 (excite) by the idea of insects as food. 【小题10】 Israeli insect farmer, Dror Tamir, said, “May be I will find insects tasty someday, but not right now.”