问题详情：
用方框中所给单词的适当形式填空。
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1. An ________ iron is very useful in our daily life.
2. Zippers are widely used in our ________ life.
3. What do you think is the greatest ________ of the twentieth century?
4. Knives are used for ________ things.
5. I don't like to wear shoes with high ________ makes me uncomfortable.
【回答】
tric y ntion ing s
知识点：选词填空
题型：完成句子
