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题库 / OG2017V-SC-299
Once numbering in the millions worldwide, it is estimated that the wolf has declined to 200,000 in 57 countries, some 11,000 of them to be found in the lower 48 United States and Alaska.
it is estimated that the wolf has declined to 200,000 in 57 countries, some
the wolf is estimated to have declined to 200,000 in 57 countries, with approximately
the wolf has declined to an estimate of 200,000 in 57 countries, some
wolves have declined to an estimate of 200,000 in 57 countries, with approximately
wolves have declined to an estimated 200,000 in 57 countries, some
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D: declined to an estimate of 200,000 . decline只能到一个数 不能到an estimate, an estimate of 200,000 核心词是 an estimate登录 或 注册 后可以参加讨论