问题
选择题
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
答案
答案：B
搜题请搜索小程序“爱下问搜题”
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
答案：B