阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

We get our warmth from the sun. The Earth 【小题1】(take) one year to go around the sun. It is always tilted (倾斜) to one side. When the North Pole is tilted towards the sun, the northern part of the world has summer【小题2】it is winter in the south. The in-between times are spring and autumn. However, not everywhere has summer and winter. In some parts of the world, the weather is always hot, and winter never comes. These are the【小题3】(country) around the equator, 【小题4】 is a line drawn around the middle of a globe of the Earth.