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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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Once numbering...，决定主句的主语是名词复数，DE选项，D中：wolves have declined to后接一个number, 而不应该是an estimate；而E中的an estimated 200,000算是一个number.
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