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Without plants people could not live. We need them for b  1  food and oxygen(氧气) that plants p  2 .And we also need them for their beauty.
Imagine a world w  3  plants. Imagine no flowers with their sweet smells, their beautiful colours and their lovely shapes(形状).Imagine when the wind blows, not being able to h  4  the leaves in the trees or watch the branches(枝条)swings(摇摆)from side to s  5 .
E  6  people need the beauty of plants. That is why we have parks full of trees and flowers, and people always try to build houses with room for some grass and a garden. Do you talk to your plants? Do you g  7  them love and care? Two scientists said they once planted two seeds(种子) in different places. While the plants were growing, one plant was given l  8  and hopeful ideas. The other plant was given only hopeless ideas. After six months, the loved plant was bigger. U  9  the earth it had more and longer roots(根)；above the earth, it had a thicker stem(茎)and more l  10 .