在线求指导:根据汉语提示填入适当
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在线求指导:根据汉语提示填入适当
根据汉语提示填入适当的单词. |
1.I think the calculator was _____ (发明) before the computer. 2.A stamp is used for _____ (寄) a letter. 3.Shoes with adjustable heels are used for _____ (改变) the style of the shoes? 4.What do you think is the most _____ (有用的) invention 5.I'm sorry I took your book by _____ (错误). |
1.invented 2.sending 3.changing 4.helpful 5.mistake