A. 请根据句意或括号中的中文提示、英文释义，写出句中所缺单词，使句子通顺。
1.My cousin is studying in Beijing, so we1.seldom (not very often) see each other now.
2.—Where's your mother?
— She is in the2.kitchen (厨房) cooking a meal.
3.We should try our best to prevent water3.pollution (the state of being dirty) because people can't live without water.
4.The weather report said that the temperature would fall4.below (在……下面) zero.
5.We all know that5.July is between June and August.
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解析：注意单词的适当形式。