Nowadays (如今), a lot of Apps like Dou yin and Kuai shou, are making a big difference (不同) to our daily life. People often _________ short-videos (短视频) on them for _________ when they are free.

It _________ good for people to spend (花费) too much time on the Apps like Dou yin. Sometimes it can make you happy, _________ it’s a waste of time. You can spend time on other things that make you feel good. If you are tired of doing Maths homework, you can _________ some English songs or do some sports. If you have nothing to do on Sunday afternoon, you can go out for a walk or go to watch an interesting _________ in the cinema.

Watching short-videos for a long time is not good for your health _________. If we spend a long time on _________, our eyes, necks and arms will be very _________. Let’s put _________ the mobile phone and stand up, go out and move!

Teeth are very important. Strong and healthy teeth can help you eat well. Also they can help you speak clearly and look better. Here are three tips for you to take good care of your teeth.

First, brush your teeth in the right way. You should brush them at least (至少) twice (两次) a day before breakfast and before bedtime. When you brush your teeth, make sure you brush all of them, not just the front ones. And change your toothbrush every two months.

Second, have good eating habits. Eating too many sweets is bad for your teeth. Instead, you should eat more fruit and vegetables.

Third, go to the dentist to check your teeth regularly (定期地).