2. 外语
  3. Many Americans mindlessly oppose hunting. They do so even in cases where animal populations are dangerous high. In

Many Americans mindlessly oppose hunting. They do so even in cases where animal populations are dangerous high. In

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问题     Many Americans mindlessly oppose hunting. They do so even in
cases where animal populations are dangerous high. In                    【S1】______
some areas of Alaska, wolves have become so rare that they               【S2】______
are running out of hunting ground and prey heavily on
moose, deer, and occasionally dogs. In past, game                        【S3】______
managers curbed wolf populations for trapping and aerial                 【S4】______
hunting without wiping away the species. Still, whenever,                【S5】______
they propose do this nowadays, they receive tens                         【S6】______
of thousands letters of protest. Growing deer populations in             【S7】______
parts of California threat to starve themselves out. Seaotter            【S8】______
colonies, booming in the Pacific coast, are fast running                 【S9】______
out of food, too, as good as putting commercial                          【S10】______
fisher-men out of business.
【S4】
选项
答案for→by
解析 此处表示“通过设陷阱等方法来遏制狼群的数量”，如果用for，是表示“为了什么目的而做什么”，此处不符合文章意思。
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