Question

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

B

此题考查短语动词的辨析。make for some place “走向”；set out on sth. “开始做”；take off “脱下，(飞机)起飞”；turn up “出现、显现”。