We all know that it is 1to keep healthy. But not all people know2to keep healthy.
After five days' hard work, we need to have a good rest at weekends. But it seems that some don't know how to spend weekends in the right way. They enjoy3 cards at night and don’t go to bed until midnight. Some gamble (赌博) all night. They forget that to get4sleep is good for health. Some never get up early in the5 and take some exercise. It is true that doing exercise is very important for us to keep 6. Some smoke（抽烟）7. Some drink too much wine（酒）. 8 too much is harmful (有害) to the body. Some eat too much rich food and get fatter and fatter. If you are much too fat, you may always 9tired. Vegetables are good to the body. But some don’t like eating vegetables. 10is also very good to body. As a saying (谚语) goes, "An apple every day keeps the doctor away." So don’t forget to eat some fruit.

如图所示的四种现象中，能用光的直线传播解释的是（　　）

整理句子的顺序。

____哥哥轻轻推了我几下，秋千就荡起来了。

____我不停地荡呀荡，秋千就越荡越高。

____一到公园，我就赶紧跑到秋千那里，排队耐心等待着。

____我最爱玩秋千。

____过了好久，才轮到我。

____当秋千荡到最高处时，我好像是要飞了一样。