题目

       Water is a hquid (渍体) ; but it can also be a solid when it is very cold and turns to ice. It can also be a gas, when it evaporates  (蒸发)  and become water vapour  (水蒸气) . The water cycle       Water is very important, and without it life on Earth should be impossible. The oceans that  cover three quarters of the Earth’s surface can be thought of as our great water reservoirs. All the  time, water is being evaporated from the ocean’s surface by the warmth of the sun. High in the sky this water vapour, turns into clouds which drift  (漂浮 )�—Your new bike is so cool.—Thank you! In fact I have _________ it for two months.A. bought B. buy C. had D. has