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It’s ten years since the scientist on his life’s work of discovering the valuabl

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It’s ten years since the scientist on his life’s work of discovering the valuabl

It’s ten years since the scientist _____on his life’s work ofdiscovering the valuable chemical.

    A. made for B.set out

C. took off  D.turned up

 

试题答案

答案:B

提示:

setout on sth开始做某事