1. Sandwiches were i_ by accident.
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( )20. I think one of the most annoying inventions_the alarm clock.
A. are B. is C. were D. was
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( )13. Keys are used for_the doors.
A. making B. locking C. painting D. inventing
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请根据表格内容写一篇文章介绍下面几种生活用品。
Invention | Time | Who | Uses |
digital camera | 1975 | Steven J. Sasson | take photos |
telephone | 1876 | Alexander Bell | communicate |
radio | 1895 | Guglielmo Marconi | listen to news and music |
There are many inventions that have caused great changes in the world. Here’s a short introduction. For example,the digital camera was invented by_
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