◎ 题干
用所给单词的适当形式填空
1. Trees must __________(prevent) from being cut down.
2. They __________(plant) ten thousand trees by last spring.
3. The sheep __________(tie) to the tree has eaten a lot of grass.
4. I can easily hear combs __________(go) through hair.
5. Great changes __________(take) in our hometown in the last ten years.
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“用所给单词的适当形式填空1.Trees must __________(prevent) from being cut down.2.They __________(plant) ten thousand trees by last spring.3.The sheep_________…”主要考查了你对  【被动语态】【分词】【现在完成时】【过去完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。