Everything needs water. We use water to wash cups, cars, clothes and ourselves. Where does all water come from? It comes from the clouds（云）. The clouds can change into（变成） rain. Some of the rain goes down the ground. Some of the rain water goes down the mountains and becomes streams(小溪). The streams come together to make rivers and lakes. Water can change itself. When water gets very cold, it becomes ice. When water gets very hot, it becomes steam(水蒸气).
【小题1】________ need water.
| A．Only animals | B．Only lions | C．Everything | D．Only people |
【小题2】We usually clean our clothes with _________.
| A．steam | B．clouds | C．water | D．rain |
【小题3】The water in the streams comes from the ________.
【小题4】When the weather gets very ________, water changes into ice.
【小题5】Where does steam come from?
| A．It comes from the clouds. | B．It comes from plants. |
| C．It comes from very hot water. | D．It comes from very cold water |
