It’s ten years since the scientist _______ on his life’s work of discovering the valuable chemical.
#83133
A
made for
B
set out
C
took off
D
turned up
推荐题目
Many questions __________ at the meeting, but he answered none.
#71826
A
came up
B
raised
C
were risen
D
asked
Don’t be joking. It’s time to ______ your business.
#65526
A
take up 
B
set out 
C
go on
D
get down to
We arranged to meet at the school gate at 8:00, but she didn’t _____
#75403
A
turn down
B
turn off
C
turn over
D
turn up