题目内容
将下面句子变为被动语态,每空一词。
They use knives for cutting things.
Knives ________ ________ for cutting things.
答案:are,used
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题目内容
将下面句子变为被动语态,每空一词。
They use knives for cutting things.
Knives ________ ________ for cutting things.