Tianjin plans to start a smart city program to deal with t  jams.

Can you i  what it would be like to live under the sea?

Teen singers TF boys are popular a young people.

Our traditional c like Peking Opera should be passed down.

It's reported that China is becoming the s  most overweight country, just after the US.

Now, you can enjoy  （免费的）Wi-Fi in many places.

People like （分享）things through WeChat now.

We should always keep an eye on school （安全）.

Helping others is the most （有价值的）thing in the world.

I  （很少）watch movies on my smart phone because it's not good for my eyes.