Read the passage and fill in the blanks with proper words (在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给）：

Water is very important for living things. Without water there can be no 1【1】on earth. All animals and plants need water. Man also needs water. Water is found a【2】everywhere. Even in the d【3】part of the world there is some water in the air.

As we all have found out, water may be a solid, or a 1【4】or a gas. When it is a solid, it may be as hard as a brick. When it is a liquid, you can pour it out of a c【5】. When it is a gas，you cannot see or feel it. Although about 70 percent of the earth’s s【6】is covered with water, there are many places in the world still running out of water. So we should make good use of water on earth.