Don't be too surprised if you see a car going down the road without a driver in Beijing these days. It might be one of Baidu's self-driving cars. Last month, Baidu was granted (授予) a license to test its self-driving cars on open roads in Beijing, China Daily reported.

Self-driving cars have been in development since 2010, when Google announced that it was making such cars. Since then, companies like Tesla, Uber and Baidu have been working to produce and test their own self-driving cars.

Self-driving cars are expected to revolutionize (革命) the way we get around. They are safer and more environmentally friendly than regular cars. They can remove the stress of driving and allow disabled or blind people to get around more easily.

But self-driving cars have their own flaws (缺陷) as well. In one test researchers pointed a laser pointer (激光棒) at the car's sensors (传感器) while it was moving. The car mistakenly thought that the laser beam was in its way and slowed down or changed direction. Flaws like this could be used by people to trick self-driving cars, according to the Guardian.

The software that is used to direct the cars may not be safe enough, reported Live Science. It may crash (崩溃). When we use our computers or smart phones, they sometimes crash without any reason. But if this happened to a self-driving car, the results could be deadly. Improvements to the software could be a solution to this problem.

Next Tuesday is my mother's birthday. I love her and I'd like to give her a nice gift. What should I buy? I hear shopping online is easy and quick And we can buy anything we want through it. But I'm not sure whether the things are good or not.

-Anna

I'm busy and tired this week, How I wish to relax myself. So this weekend I'm going to the beach with my cousin. When we get there, we'll swim in the sea walk on the beach and have a picnic，and never think about our homework! We're sure to have fun.

-Jack

I believe（相信）everyone hopes to see a clean and nice city. But our city isn't as god as we think. So this Sunday I'll help clean the city park with my friends! We're going there by bike. There we will pick up the rubbish and clean the ground. We hope to finish the cleaning in a day.

-Lucy

It's great to help others. As students，we may try our best to help people in need. Old people are always lonely and they need care and help. So this weekend I'll visit an old people's home with my classmates. We'll help clean the old people's rooms, tell them stories and sing or dance for them.

-Dave

要求：

1）字数：60字左右。

2）文章必须包含所有提示内容，并可作适当发挥。

3）不得出现真实姓名和校名。

4）条理清楚，语句通顺，意思连贯，书写规范。

That is my favorite teacher. Thank you for listening!

People often say that the Earth is like our mother. She 1 life to all the living things on the Earth and provides us 2 air, food, water and other important things we need for3.

In the past she was beautiful and rich, 4 now she becomes 5 and poor. People 6 rivers and lakes, destroying forests and 7 animals…

Would she like 8 her children throw rubbish here and there? Would she like to see her children cut down the trees and destroy the grass? Would we like to see 9mother become too sad? It's time for us to ask ourselves 10 we make our mother sad.

Everyone should know that there 11 only one Earth. If we go on 12 things like this, she won't13 fit to live on any more. It's time for us 14 her, take good care of her and protect her.

We should save the Earth and save ourselves 15.

This is a photo of Mr. Brown's family. You can 1 four people in it. On the right is Mr. Brown. He is the husband of Mrs. Brown and the 2 of Lucy Brown and Lily Brown. He 3 glasses and looks very young. He is in a brown coat and black trousers. On the left is Mrs. Brown, the 4 of Mr. Brown and the mother of the girls. She looks very 5 too. She is in a beautiful yellow dress. Lucy Brown and Lily Brown, the daughters, are in the middle. They are twins (双胞胎) . They look the same but their clothes are 6. They are new students in our 7. They are good at their studies and they are 8 late for school. Also they are very 9 everyone around them so we all like them. They 10 many new friends here.