He tried to his strength.

提示：1）What's your favourite sport?

2）How often do you play it?

3）Who do you usually play with?

4）What kind of memory do you have about playing this sport?

My favourite sport

    Have you ever considered starting a fitness program? Since exercise can reduce the risk of diseases, improve balance, help lose weight, better sleep habits and even make you confident, you should start a fitness program in the following steps.

    Test your fitness level

How many meters can you walk or run in one minute? How much time does it take you to swim 50 meters? What is your heart rate (心率)? The data (数据) of your fitness level can help you know what activities you need.

    Design your fitness program

You may have begun your daily exercise. But a personal plan helps more. First, you should have your fitness goals (目标). For example, what do you want to look like, to be slimmer or quicker? A balanced plan will help you start low, progress slowly, do right activities and even allow you to recover (康复) if you get hurt.

    Prepare things needed for sports

You need something practical, enjoyable and easy to use. It could be a pair of trainers, a volleyball or a bicycle. You can also download fitness apps (应用程序) on your mobile phone to measure distances, calories burned or your heart rate.

    Take action

Now you're ready for action. When you begin, don't always try tough tasks. Listen to your body and reduce exercise time if necessary.

    Monitor your progress

Test your fitness level again six weeks later. If you have achieved your goals, increase exercise time to continue improving.

Starting an exercise program is an important decision. By planning carefully and acting step by step, you can have good health.

    Where were dominoes (多米诺骨牌) from? Modern dominoes first showed up in Italy during the 18th century. But it is believed that the earliest dominoes were Chinese playing cards. Italian missionaries (传教士) in China may have brought the game to Europe. Do you think so?

    Do you like to play with dominoes? Dominoes are small rectangular (长方形的) pieces made of wood or plastic (塑料). People can place dominoes in different shapes. Then, they push one domino down and the rest of the dominoes fall one by one. It is interesting to watch.

    But placing dominoes is hard. To make sure the dominoes fall smoothly, the space between each domino is important. According to domino—play. com, if a domino is about 4 cm long, then the space between two dominoes should be1—2 cm. If the space is too big, the dominoes will stop falling halfway. If the space is too small, the dominoes will fall too quickly and won't look interesting.

    Beginners can start by putting dominoes in a straight line. This is the easiest shape. Professional (专业的) players can place dominoes in many other shapes, including big circles, beautiful flowers and even famous paintings.

—Sorry, I have no idea. But it has changed the world greatly.