When parents send their children to school，often they don't know what happens day to day. Parents depend on what their children tell them about they are doing and what they are learning. Generally schools will host parent-teacher meeting at least twice a year. Parent-teacher meetings are short meetings between parents and their children's teacher. Usually they are held when teachers give put a student's grades for the term. The parent-teacher meetings give teachers a chance to let parents know how their child is doing. A teacher will let a parent know the student's advantages and bring to the parent's attention any problems with grades or behavior(行为).The meetings also offer parents the chance to ask questions and see what their child is learning.

    Most children do not go along with their parents to the meetings. This allows both the parent and teacher to talk honestly about the child's progress without making the child feel bad. Usually a teacher will offer advice to the parent on how to support their child's education.

    Laughter is natural for people. We start to laugh at about four months of age. We start to laugh even 1 we start to speak.

    Laughter connects us with others. We laugh more when we are with other people. It's difficult to pretend to laugh. Laughter is 2. When people pretend to laugh, most people know it's not real.

    When do people laugh?

    Only 10 to 20 percent of laughter is about something 3. Most laughter is about being friendly with other people. Most laughter says, "I don't want to 4 with you. I want to be friendly with you." This kind of laughter brings people together.

    We often laugh when we feel nervous. In movies, there is often a joke at an exciting moment when everyone feels nervous. It is usually a(n) 5 joke, but we laugh a lot. Our laughter helps us 6.

    Why doesn't everyone laugh at the same joke?

    Not everyone has the same sense of 7. Some people think a joke is funny, but other people don't think so. People have different ideas about what is funny.

    Our idea of what is funny changes with 8. For young children, the world is new. They are interested in many things, so they laugh 9. Teenagers often laugh to protect themselves. Adults laugh at themselves and other people with similar problems. They laugh at things that give them stress. Our 10 for laughter change gradually.

A Chemical reactions(化学反应)make for some great experiments.You can make use of the CO₂ (carbon dioxide) given of by a baking soda and lemon Juice reaction to blow up your balloon! 

What you'll need:

★Balloon 

★About 40 ml of water (a cup is about 250 ml so you don't need much) 

★Soft drink bottle ★Juice from a lemon 

★1 teaspoon of baking soda Instructions: 

★Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up. 

★Put the 40 ml of water into the soft drink bottle. 

★Add the baking soda and mix it with water. 

★Put the lemon juice in and quickly put the balloon over the mouth of the bottle. 

What's happening?

If all goes well, then your balloon should inflate(膨胀)! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO₂. The gas rises up and escapes through the soft drink bottle. It doesn't, however, escape the balloon, pushing it outwards and blowing it up. 

There are 520 boys and 500 girls in our school. The school made a survey（调查）about our favorite sports. Here are the results.

After seeing the results, the P. E. teacher advises us to join different sports clubs. He also encourages（鼓励）us to try some new sports. It may bring us some surprises.