Question

It's ten years since the scientist _______on his life's work of discovering the

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

Answer 1

答案B
此题考短语动词。句子合理的意思应是：自从那位科学家着手／开始去为发现这一有价值的化学物质而工作。至今已经10年。选B项表开始或着手某事，即set out to do sth.或set out on sth.正合理。make for不是固定短语，只能解释为“为……而做”，take off当“脱下（衣物）、从……取下……、（飞机）起飞”等解，turn up意为“出席、露面”，这三项均不合题意。