问题
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
B:set out
C:took off
D:turned up
正确答案是：
同类题型
It’s crazy of you to spend more time playing computer games than you ______ studying.
The teacher told the students ________ talkin class.
_____ an ad does not lie, it does not mean it is altogether innocent
1Mummy, can youpick me _______ after school
What’s wrong with the girl I saw her runout of the room with her face ____ in her hands.