题目内容：
What do rainforest trees tightly rely on? [A] Saplings.
[B] Microorganisms.
[C] Flora and fauna.
[D] Insects and birds.
参考答案：
答案解析：
填空题：What do rainforest trees tightly rely on? [A] Saplings. [B]
- 题目分类：英语四级
- 题目类型：填空题
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[A] Saplings.
[B] Microorganisms.
[C] Flora and fauna.
[D] Insects and birds.