She is Liu Hui, a middle school student in Anhui, one of the “stay-at-home children” in her town. Liu Hui is 12 years old and lives 【小题1】 her sister. Her parents left home 【小题2】（make）money in big cities when she was only four. Liu Hui has to take care of her younger sister. They have to stay at home alone because they have to go to school in the town. Today is her 【小题3】（twelve） birthday, 【小题4】 she doesn’t have a birthday cake.

“I used to feel sad without my parents at home, ”she said, “but now I know why they do so, and I am used to 【小题5】（live） alone. They have to go away to make money for us so that we can live a better life. ”

Every day, Liu Hui gets up at 6：30 a. m. and cooks breakfast 【小题6】（quick）. Then the two girls go to school. They have supper at 6：00 p. m. Then Liu Hui does housework and helps her sister with her homework. She usually goes to bed at 9：30 p. m.

Though busy, Liu Hui 【小题7】（be） the best student in her class so far. She said, “My life is OK. But I still hope my parents 【小题8】（come） back and live with 【小题9】（we）. ” Everyone 【小题10】（touch） by Liu Hui when they heard these words.

The Summer vacation is 【小题1】 (结束)．It’s true that time always flies fast. During the vacation，the weather was hot and I couldn’t do much work，but I lived 【小题2】 (愉快地). As it was hot in the afternoon, I 【小题3】 (度过)all the afternoon in the library.

One evening when I came home，I felt something unusual. Had someone come in? The back door and the windows were all locked and it didn’t 【小题4】 (好像)that anyone had broken into the house. Had anything been taken? I looked everywhere and at last found my 【小题5】 (相机)and watch missing.

The next afternoon I went out at my usual time, but I didn’t go to the library. Instead I took a short walk in a park nearby and came home 【小题6】 (穿过)the back door. I sat down to wait and see what would happen.

It was 4 o’clock when the front doorbell rang. 1 was making 【小题7】 (茶)at the time. And the next moment. I heard my letter box being pushed open. Picking the kettle(水壶)of the 【小题8】 (烧开的)water, I moved quietly towards the door. A piece of wire appeared, and then a hand. The wire turned and caught around the knob(手柄). I poured the water at the hand. A sharp cry was heard 【小题9】 (在外面)as the wire fell to the door and the hand was 【小题10】 (拖、拉)back. Then I heard the running feet. Soon the policeman caught the thief.

Usually students pass their school work through different hands, from their group leader and finally to the teacher. It is quite 【小题1】 (common), but sometimes it can go wrong and take a lot of time.

To solve this problem, Zhang Xirui, a 13-year-old student from Guangdong 【小题2】 (come) up with a useful tool—a smart homework collection (收集) robot. This helped him win the 【小题3】 (one) prize in the 20th Guangdong Provincial Children’s Invention Competition.

The robot uses RFID technology—a reader and a special tag (标签) that can share information without 【小题4】 (touch) each other. Each student’s notebook has a special RFID tag with the name and the subject. Each student only needs to put his notebook on the robot, and the machine “sees” 【小题5】, reads its tag and takes it out of the name list. “The robot can also help teachers look 【小题6】 those who have not handed in (上交) homework,” Zhang said.

Now, Zhang is planning to make 【小题7】 new robot and hopes to use super radio technology to read lots of RFID tags from far away. That means 【小题8】 you stick (贴) a special tag on your notebook, the robot will read the information from lots of notebooks at once. Zhang believes this is the key to how AI can make life much 【小题9】 (easy) for us.

When Zhang grows up, he dreams of becoming a 【小题10】 (science). “I have tried making model planes and other scientific and creative projects. Inventing has brought me joy and happiness,” he said.