扫描二维码，直接登录
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
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
C/E选项，C和E选项的主语the wolf和wolves分别指代狼群这个种群和狼群个体，在逻辑上都没错，因而wolves和the wolf并不是解题的着手点。剩余C/E选项的差异在于an estimate of 200000和an estimated 200000，很明显an estimate of 200000，200000是修饰estimate (the people of China)，即estimate是宾语；而an estimated 200000，200000是宾语，an estimated修饰200000。从原文意思可知应是降到某个数量，而不是降到一个估计值(estimate)。所以正确选项是E。
登录 或 注册 后可以参加讨论