We can use theseknives to cut the paper．题目和参考答案——青夏教育精英家教网——

题目内容

17．We can use theseknives （ knife ） to cut the paper．

分析我们能用这些刀子来切割纸．

解答答案：knives
根据所给词knife是可数名词单数意为"刀子"，结合空格前these"这些"后接可数名词复数，knife变复数需变fe为v加es，即knives，故填knives．

点评本题为完成句子，结合所给词knife以及句中的关键词these可确定需要使用名词复数，在本题中还要注意单词的拼写．

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