It’s ten years since the scientist _______ on his life’s work of discovering the valuable chemical.
A.made for | B.set out |
C.took off | D.turned up |
相关知识点
推荐套卷
It’s ten years since the scientist _______ on his life’s work of discovering the valuable chemical.
A.made for | B.set out |
C.took off | D.turned up |