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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 yearssince the scientist _________ on his life’s work of discovering the valuablechemical.

A. made for

B. set out

C. took off

D. turned up

 

试题答案

答案：B

解析：

set out“ 出发, 宣布”的意思。

 

标签：hisonlifeofwork

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