【实践篇】
It is important for teenagers to learn good manners. Above all, knowing social manners helps them behave politely. 1. Also, they will become more confident than before. What's more, people are usually willing to offer good chances to teenagers with good manners. All these can possibly change their lives.
When teenagers learn manners, most of them are taught to say "please" "excuse me" and so on. However, good manners are far more than these simple words. They need to continue learning more. 2.
The first important manner is to show our thanks to others. 3. It can be a small thing, like a classmate passing us a pencil or a parent preparing dinner for us. Saying "thank you" tells others that we care about their kindness. It is easy but very meaningful.
4. When we have meals with our family or friends, we should wait for everyone to sit down before eating. We should not talk with food in our mouth or make loud noises while eating. It is also impolite to reach across the table or play with food. Good table manners show our respect to the people who eat with us.
Another key point is to respect others when we talk. When someone is speaking, we should listen carefully and never interrupt(打断) them. 5. We should not speak in a rude or loud voice. Respecting others' words makes our communication comfortable.
Good manners are not hard to learn. We don't need to wait for a special day. Let's start to practice polite behaviours from now on. Small changes can make our life better and make us more popular with people around us.
请根据上下文，将下面句子还原到短文中。
A. Here are some tips to get them started.
B. We should also learn some basic table manners.
C. We should look at the person and reond politely.
D. They can decide what to do in a certain situation by themselves.
E. Whenever someone helps us, we should say "thank you" clearly and warmly.

1. D 2. A 3. E 4. B 5. C