The lock is made (of/ from) metal. It's very hard.

题型：填空题题类：常考题难易度：普通

仁爱科普版九年级上Unit 4 Amazing Science Topic 1 When was it invented?同步练习

举一反三

We all want to know {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} this competition.

I hope to visit the Great Wall {#blank#}1{#/blank#} {#blank#}2{#/blank#}.

—Thank you.

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