九上英语期中复习语法完形填空（7篇）
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简介
【一】 You’re thirsty and you get yourself a glass of water. Do you ever _______how old that water really is? The glass of water that you’re_______may have fallen from the sky as rain only last week. However, water itself has been around pretty much as_______as the earth has! In fact, _______oceans, seas and rivers cover 70％of the earth, there is a _______ supply(供给)of water, which keeps on moving round the earth. This is_______of what’s known as the water cycle. The sun heats up water and it turns into clouds, which are_______from water vapor(水蒸气).When the clouds become _______, the water falls back onto the earth as rain. Of course, clean water is absolutely essential fo
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