糖尿病筛查怎么做:Ask a English question

来源:百度文库 编辑:查人人中国名人网 时间:2024/03/29 15:37:16
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
选什么?WHY?

B吧,set out on sth./to do sth.是着手做某事
自从这位科学家开始他探究有价值的化学物工作已十年了

since 其后,后来,以前,自……以后
valuable 值钱的,有价值的;贵重物品
chemical 化学的
made for 走向,向……前进,有利于
set out 陈述,说明,打算,试图
took off 脱去,起飞