植树节：为地球添一抹绿（语法填空）
植树节：为地球添一抹绿（语法填空）

Each year on March 12, China celebrates National Tree Planting Day. This special day is dedicated to planting trees and protecting the environment. It was established to improve the ecological environment, increase forest cover, and raise people’s ___1___ (aware) of environmental protection through nationwide tree-planting activities.

Tree planting is very important for several reasons. Firstly, trees act as the ___2___ (lung) of the Earth. They take ___3___ carbon dioxide and release oxygen, which helps clean the air and regulate the climate. Secondly, trees provide homes for many animals and plants, helping to protect biodiversity. ___4___ (they) roots also help prevent soil erosion, keep water in the ground, and reduce the risk of flooding. Additionally, a green environment with lots of trees makes our surroundings more ___5___ (beauty) and is good for our physical and mental health.

Students can take part in Tree Planting Day activities in many ways. Schools and universities often organize tree planting events ___6___ students can plant trees together and feel the joy of helping the environment. You can also join local community activities to plant and care for trees with neighbors. Another way ___7___ (participate) is by attending talks and workshops about environmental protection. Even ___8___ (share) information about Tree Planting Day on social media can encourage others to care for nature.

Thanks to these efforts, China has made great progress in increasing its forest coverage. Since the 1980s, Chinese people have ___9___ (voluntary) planted more than 35 billion trees. The forest coverage rate ___10___ (rise) from 8.6% in the early years of the PRC to 16.5% by the end of 2000. On Tree Planting Day, students and workers across the country plant trees in suburbs, learning to appreciate nature while making a real difference.
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1.1.

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解析：选awareness。awareness 考查名词。形容词性物主代词people’s后接名词，aware的名词形式是awareness，意为“意识”。

2.2.

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解析：选lungs。lungs 考查名词单复数。“the lungs of the Earth”是固定表达，意为“地球之肺”，用复数 lungs表示树木作为一个整体发挥的作用。

3.3.

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解析：选in。in 考查介词与动词的搭配。take in意为“吸入”，是固定短语。

4.4.

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解析：选Their。Their 考查形容词性物主代词。修饰名词roots，用they的形容词性物主代词their，且位于句首，首字母大写，故填Their。

5.5.

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解析：选beautiful。beautiful 考查形容词。make +宾语+宾补，宾补用形容词；more后接形容词原级构成比较级，beauty的形容词是beautiful。

6.6.

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解析：选where。where 考查关系副词。引导定语从句修饰先行词events，且从句中主谓宾结构完整（students can plant trees），缺少地点状语，故用where。

7.7.

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解析：选to participate。to participate 考查动词不定式。此处表示参加社区活动的目的是参与和照料树木，用不定式to participate作目的状语。

8.8.

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解析：选sharing。sharing 考查动名词。动名词短语sharing information作句子的主语，表示“分享信息”这一行为。

9.9.

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解析：选voluntarily。voluntarily 考查副词。修饰动词planted，用副词形式；voluntary的副词是voluntarily，意为“自愿地”。

10.10.

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解析：选had risen。had risen 考查动词时态。结合后面的时间状语by the end of 2000可知用过去完成时。故填had risen。