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If animal parents were judged by human standards, the cuckoo would be one of nature's more _____ creatures, blithely laying its eggs in the nests of other birds, and leaving the incubating and nurturing to them.
- A.mettlesome
- B.industrious
- C.domestic
- D.lackluster
- E.feckless
E显示答案
以上解析由 考满分老师提供。
