Plants are very {#blank#}1{#/blank#} (importance). This is {#blank#}2{#/blank#} plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. They can get their food by {#blank#}3{#/blank#}(eat) plants and animals. So animals and man need plants in order {#blank#}4{#/blank#}(live). This is why there are so many plants {#blank#}5{#/blank#} us. There {#blank#}6{#/blank#} (be) two kinds of plants: flowering plants(开花植物) and non-flowering plants(不开花植物). Almost all the trees around us are flowering plants. We can know some trees from their flowers {#blank#}7{#/blank#} fruits. Non-flowering plants do not grow flowers. We cannot see many non flowering plants around us. If we look {#blank#}8{#/blank#}(careful) at the plants around us, we {#blank#}9{#/blank#} (find) that there are many kinds of plants. Some plants are large and some are small. Most of {#blank#}10{#/blank#} (they) are green.

提示：1）树木在保护环境方面的作用：吸收有害气体，是对抗空气污染的主要斗士；

2）树木在我们日常生活中的贡献：很多家具来自于木材，纸张来自于木材；

3）树木面临的问题。

Dear students,

    As we all know trees are very important in our lives. We can't live in the world without trees.

    Thank you very much for your listening.

—OK. I'm coming.