Some birds like to sit on a sheep because ______. What does the second paragraph mainly discuss?

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问题 Some birds like to sit on a sheep because ______.
What does the second paragraph mainly discuss?

选项 A、Some animals and plants depend on each other for existence.
B、Some animals and plants develop their relationship easily.
C、Some plants depend on each other for food.
D、Some animals live better together.

答案A

解析从文章最后两句In their skin．．．needs to breathe．If the plants are killed．．．the corals will die．说明了动物和植物之间相互依存的关系。

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公共英语二级笔试

公共英语（PETS）

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Some birds like to sit on a sheep because ______. What does the second paragraph mainly discuss?

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