What time of day can you think most quickly? Are you a morning person?" Or does it take you a few hours to get your brain going? A lot of recent research suggests that we should pay attention to our body clock. It can tell us what time of day we can perform best at.

    Many people work best later in the morning. This is because the body's temperature takes time to rise through the day. Taking a warm shower when you wake up can help your body's temperature rise quickly.

    But everyone's body clock is different and some are special. Morning people will get up early and work better early in the day." Evening people will work later, but work better towards the end of the day.

    Research shows that we're better at some activities at certain times of the day." Physical performance is at its best between 3p. m. and 6p.- m.-,- so it's better to exercise later in the day.

    Between noon and'4p. m. , people begin to pay less attention. This is because we think less quickly after, a big meal. Research also shows we become sleepy around 2 p.m. This is why people in Spain take a short sleep in early afternoon.

    Finally'it is best to eat when we' re active. This allows our body to burn calories (卡路里) better and stops our blood sugar levels from getting too high.

Grade 7 students from Guangming Middle School had a class outside the classroom. They had a 1 farming class in the fields(田地). Everybody loved it!

Farmers introduced wheat ( 小 麦 ) to the students and answered 2 questions. The farmers also 3 them around the fields. They le arnt that 4 usually harvest(收获) wheat in September.

"I 5 some notes in my notebook." said Daming. He learnt that eating wheat can be good for people.

Other students also learnt something new."I know about wheat only from 6 . This time, I see real one and learn how it 7 ." said Dongdong.

 Before this, Lingling thought that farming was something old.8 this trip changed(改变) her ideas."I see really cool farming machines(机器), and they show me how farming changes and gets 9 ." said Lingling." Farming changes10 . I'm so excited to see it in this lesson!"

Students learn their lessons in class. In class,1 teach them. Students sit in the classroom listening to the teachers. This is a way of learning. It's very useful, but is this the 2 way for students to learn? Of course not. There is 3 way to learn. Students can herself teach themselves. For example, if you forget something 4 you are doing your homework, you can read books to find the 5 This is a way to teach yourself and it is not a(n)6 thing. You can do this at any place and at any time. 

How to teach yourself? The first thing you must do is to read. Read something you are 7 . The second thing is that you must ask yourself questions. The questions should be about the things you don't 8 or you want to know. You can write down these questions. A clever student is usually good at asking questions. The third thing is that you should try to answer the questions by thinking hard, by reading books and9 by asking other people. If you keep teaching yourself for a long time, you are sure to10 your study. 

There are many kinds of sports in the world, such as different running, swimming, ball games, and so on. But do you know some strange (奇怪的) ones? Today I want to tell you some of them.

Do you think they are interesting?

China's new four great inventions have made a big difference in people's daily lives and also shown China's great progress in technology to the world.