In winter feeding efforts are most satisfying to people and are of greatest benefit to birds.

In winter feeding efforts are most satisfying to people and are of greatest benefit to birds.

题目
In winter feeding efforts are most satisfying to people and are of greatest benefit to birds.
and are of greatest benefit to birds 为什么要加个of
去掉of
答案
举一反三
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奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
1,人们染上烟瘾,最终因吸烟使自己丧命.
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