阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。

All living things on the earth depend on(依赖) each other. At the same time, they all need (sunlight). But only plants can turn sunlight food. Plants make food from sunlight, water and things in the soil and air. They also help to clean the air. Plants (be) important to people. They help us fulfill (we) basic needs. So we should plant plants. There are some steps for (plant). (one), we dig a hole and make sure it is large enough to hold the roots of the seedlings. Then put the seedlings inside, cover the roots and (full) the hole with dirt. We must take care of the plants very (good), they will die.

In word, it's pleasant to plant. We should plant many plants around us.