初三英语第九单元grammar focus 的句子和翻译

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　　When was the car invented小汽车是什么时候被发明的？ It was invented in1885它是在1885年被发明的。
　　When were electricslippers invented电动拖鞋是什么时候被发明的？ They were invented last year它们是去年被发明的。
　　Who were they invented by它们是由谁发明的？They were invented by Julie Thompson它们是由朱莉 汤普森发明的。
　　What are they used for它们被用来做什么？They‘re used for seeing in the dark他们是用来在黑暗里照明的。