Animals are ______great use to human beings A of B with

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Animalsare______greatusetohumanbeingsAofBwithAnimalsare______greatusetohumanbeingsAofBwithAnimalsare

Animals are ______great use to human beings A of B with
Animals are ______great use to human beings A of B with

Animals are ______great use to human beings A of B with
be of great use to(for) 是词组固定搭配,翻译为“对”的意思.
什么叫固定搭配呢,就是语言发展至今形成了一些规矩的定律,比如“look forward to”,这是规定,是天经地义的事情,书面语就得这么用.勤背语法,加强记忆!