7. if everyone makes contribution to protecting the environment, the world will become much more beautiful.

　　三、旅游

　　1. last sunday(saturday,…) ,it was sunny(rainy, windy, foggy,)

　　2. i got up very early (late). after breakfast i went to …with my friends by bike, bus，…

　　3. we enjoyed ourselves.

　　4. we forgot the time. we didn't come back until 5 o'clock.

　　very exciting.

　　4. in fact, i have never seen such an exciting match before.

　　5. the score was 5-3. our team scored three goals in the last fifteen minutes.

　　6. class one won this match. class two lost.

　　7. class one played well. they deserved to win.

　　8. their pe teacher was very pleased with their performance.

　　五、健康

　　1. it is very important to keep healthy.

　　2. how can we keep healthy?

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