Somepeopleconsidered________cruel

发布时间：2020-07-28 12:22:10

Some people considered ________cruel to send animals in rockets into outer space．A.that isB.it beingC.it beD.it

网友回答

D解析不定式短语to send animals in rockets into outer space为宾语，被形式宾语it替代。
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