A special pet-care center in Shenzhen has been highly praised by people. It is China’s first pet-care center to take care of pets while their masters are in quarantine（隔离）because of COVID-19.

Because of COVID-19’s Omicron variants（奥密克戎变）, many people have been taken into quarantine, leaving their pets at home alone. Such a small pet-care center in fact is a big step for love, which shows the city’s care for people’s needs during pandemic（疫情）. It’s common that most pet owners see their pets as members of their family. Besides, pets are also people’s private things. So, taking good care of pets will show the government’s respect both to life and private things of people.

Shenzhen has set a good example. Some pets even received certificates（证书）of “Little heroes against COVID-19”. One of these certificates was awarded to Fu Zai, a British short-hair cat. He spent about 20 days at this special pet-care center. The certificate said: “Dear Fu Zai, in view of your excellent performance at the pet center, doing pretty well in eating, walking and other tasks, and successfully fighting against the pandemic, we have decided to award you the title Anti-pandemic Little Hero. This certificate is for you and we hope that you will grow up healthy and happy!”

The high praise on the small pet center in Shenzhen shows people’s strong wish to have their pets well cared when they are in quarantine and this wish exactly should be paid attention to by government. Although the care center can only take care less than 300 pets, it’s undoubtedly a good start.

①People who have dogs love to talk about dogs. If you have a dog or if you are friends with a dog owner, you are probably heard many interesting facts and stories about these four-leggged friends of ours. You may have heard someone say that dogs are color-blind. But is this true? Do you know anything about this fact?

②________ Just like us, dogs have retinas (视网膜). The retina is an important light-sensing structure. Dogs also have cone cells (视锥细胞) and rod cells (视杆细胞) in their retinas. The cone cells allow dogs to perceive (感知) color and see things in detail, while the rod cells help them see things in the dark and notice movement.

③Most humans have three kinds of con e cells: blue, red and green. They allow us to tell the difference between different colors. But dogs have only two kinds of con e cells. One kind is blue, and the other lies somewhere between red and green. Therefore dogs are unable to tell orange, red and green. They can only see things in yellow, blue, grey, brown, white and black. In other words, the vision (视力) of dogs is similar to that of a red-green color-blind man. Although they have fewer kinds of cone cells, dogs have more rod cells than humans. This allows them to see more clearly in the dark and notice movement more exactly than us. While a camper is spending a night outdoors with his dog, for example, the dog may suddenly stand up and stare into the darkness. This can be a little worrying for campers who are alone. The dog, however, may have simply seen a small mouse moving across the grass in the distance that we might never be able to see.

④The next time someone mentions that dogs are color-blind, you can remind them, “They’re red-green color-blind, to be exact.” While it may be true that our lovely animal friends see fewer colors, they can still see better than us in many other ways!

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Once there were two mice. They were friends. One mouse lived in the countryside. 【小题1】 After many years the Countryside Mouse said to the City Mouse, “【小题2】 ” So the City Mouse went to the countryside. The City Mouse said, “This food is not good and your house is not good. 【小题3】 You should come and live in the city. You would have nice food to eat. You must come and see me in the city.”

The Countryside Mouse went to the house of the City Mouse. It was a very good house. Nice food was ready for them to eat. But just as they began to eat they heard a great noise. The City Mouse cried, “【小题4】” They ran away quickly.

When they came out, the Countryside Mouse said, “I do not like living in the city. 【小题5】 For it is nicer to be poor but happy than (比) to be rich but afraid.”