With a little bit of milk and white vinegar （醋）, you can create a material similar to plastic in minutes. The experiment is completely safe and you can make whatever you would like out of the plastic.

Heat（加热）a cup（240 ml） of milk. Pour the milk into a pot. Heat the milk until it is just under boiling. Keep stɪrɪng（搅拌）the milk.

Add 4 spoons（60 ml）of white vinegar to the milk and stir. While the milk is still hot, add all of the vinegar to the pot and stir slowly. As you stir, you could see that clumps（团块）will start to form. If no clumps form, the milk is not hot enough. Try again with hotter milk.

Pour the warm “milk” through the strainer（过滤器）. Simply place the strainer on the top of the bowl.Let the “milk”cool for a bit and then pour it over the strainer. Then you will see the clumps remaining on the top of the strainer. Put the clumps on a piece of paper.

Squeeze（捏）all of your clumps together. Work it with your hands for a few minutes until it is easy to shape. You can use models to form a shape and set it aside to dry. Wait at least 2 days for the “plastic” to dry.

How to make “plastic” out of milk
	First, pour 【小题1】 milk into the pot and heat the milk.
	Second, add four spoons of white vinegar to the pot and stir until 【小题2】 the clumps.
	Third, 【小题3】 the “milk”and pour it over the strainer. Then put the clumps on a piece of paper.
	Fourth, squeeze all the clumps together, form a shape with models and 【小题4】 one “plastic” to dry.

Doctors may tell you that fast food is bad for your health. But many young people don’t listen to that. One of the most popular fast food is the hamburger.

The hamburger got its name from the German town of Hamburg. It was famous for its beef. McDonald’s is one of the world’s most famous fast-food restaurants. You can find it in many parts of the world. The first McDonald’s opened in April 1955 in Des Plaines, Illinois. But what makes McDonald’s so popular?

Lee Cho, a South Korea, says, “I often go to McDonald’s. It’s clean, less expensive than other restaurants and saves time.”

Natalia, a girl from Moscow, says, “I find the hamburgers very delicious and the ice-cream is out of this world.”

Karen Smith, from Frankfurt, says, “McDonald’s is a favorite meeting point for my friends and me. We can visit there and talk for hours in a friendly atmosphere (氛围). There are lots of young people around.”

Older people dislike this kind of food. In their eyes, lots of young people are too fat because of it. What’s more, many parents think their children eat too much high-calorie (卡路里) food. It’s not good for children.

Most goldfish are gold or orange or red, but some are black, and some have spots. Young goldfish are little. Old goldfish are bigger. A goldfish has a tail. It has one big fin on its back and little fins underneath （在下面）. Its fins and its tail help it to swim. A goldfish has two big eyes. It has a mouth that opens and shuts. It has gills（鳃）.

All goldfish live in fresh water. They do not live in salty seawater. Water in a goldfish tank has to be very clean.

Goldfish eat fish food and little white worms. They just eat a little. If the water is very cold, goldfish cannot eat at all.

Food that they do not eat will make the water dirty, and then the goldfish will get sick. Do not give bread to goldfish. They will eat some of it, but it is not good for them, and it will make water dirty.

A goldfish has gills to take air out of the water. Have you seen a fish opening and shutting its mouth? Water is going into its mouth and out of its gills.