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题目内容
While there is no evidence that Bigfoot is real, several well-known species were once thought to be________; the okapi, for instance, was known as the “African unicorn" until explorers obtained proof of its existence.
- Athreatened
- Bfabulous
- Cextinct
- Ddefunct
- Elegendary
- Fsecretive
B,E显示答案
以上解析由 考满分老师提供。