Feet are an important part of you. Without them, you couldn't stand up, walk or run around. Your feet work so hard that sometimes they get sweaty (出汗).

Think of a hot summer day when you have been walking around all afternoon. Your feet have been in those trainers for a long time! The moment you take off your shoes, you feel good and relaxed, but your feet smell bad. You may think it is because of the sweat. But in fact, sweat itself has no smell. It's the bacteria (细菌) on your skin (皮肤) that mix with it and gives off a bad smell.

Bacteria love dark and wet places like the inside of sweaty shoes. The sweatier you get, the more bacteria there will be. When you wear your shoes, bacteria will have a good meal on your feet. They eat dead skin cells from your skin and then leave a kind of waste called organic acids (有机酸). These organic acids smell bad. Things will become better if you wear cotton socks.

We usually have three meals a day——breakfast, lunch and dinner. Different people have different food for breakfast. Some children tell us about their breakfast food. 

Simon is an American boy. He usually eats cakes and drinks milk with sugar (糖) for breakfast. He loves sugar. He is short. He doesn't like to drink juice for breakfast.

Jack is from the UK. He usually has bread and a glass of juice for breakfast. His favorite is apple juice, but his family like orange juice. They usually have eggs and hamburgers. 

Lucy is a Chinese girl. She usually has soup (汤) and baozi with meat for breakfast. She doesn't have bread and cakes for breakfast.

Niu Niu, a six-year-old girl, has become a good helper in a silent foot spa (足疗馆). The owner of the foot spa and all of the workers can't hear. And the girl helps them to communicate with the customers. 

Niu Niu is the daughter of the foot spa owner Hu Yong, who lost his hearing because of a high fever in his childhood. This made it difficult for him to get a job. After finishing training in a foot spa, Hu started his own business in Chengdu in 2019. Peng Feng, the mother, who is also deaf, works together with her husband at the shop. 

Though their shop is small, it is popular with customers because of the couple's good skills. The foot spa is usually busy in the evening, when Niu Niu comes home from school and helps her parents. Niu Niu helps her parents in her sweet child voice and with rich body language. She is very funny and always makes customers laugh happily. 

"She is always cheerful, active and outgoing," said one of the customers. 

"Dad taught me to work hard," Niu Niu said. In her opinion, her parents are like superheroes who look after the family and her. "My parents are different from other people, but they are the best for me," she added. 

Choose the best choice from A, B or C according to the passage.

Are you shy? If you are, you are not alone. In fact, nearly 50% of people are shy, and almost 80% feel shy at some point in their lives. Why are people 1 ?

It is found that family size might 2 people to be shy. Children with no brothers and sisters may be shy. Growing up 3 , they often play by themselves. They are not able to develop the same social skills as children from big 4 . 

Another cause of shyness could be 5 . As more and more people use the Internet, they 6 less time outside, talking to people. As a result, they lose practice at conversation. 7 to new people face to face can make them feel nervous.

For shy people, it can be 8 to make friends, speak in class, and even get a good job. But scientists say you can 9 your shyness. They suggest trying 10 things and practicing conversation. 

Anyway, don't be afraid of shyness—you are valued for what you are!