单句语法填空/单句改错
1.(2016·全国Ⅰ,68)On my recent visit, I held a lively three-month-old twin that had been rejected by ________(it) mother.
答案 its [根据空格后的名词及前文中的a lively three-month-old twin可知要用形容词性物主代词。]
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