It’s ten years since the scientist ____ on his life’s work of discovering the valuable chemical.
#65014
A
made for
B
set out
C
blocked out
D
turned up
推荐题目
The word “moon” is an ancient word ______ “month”.
#83483
A
joined with
B
joined to
C
related with
D
related to
 How much has their company     this year? 
#76862
A
brought in
B
brought down
C
come about
D
made in
 He had learned enough german to _____ a conversation.
#82717
A
carry out with
B
carry on
C
continue on
D
carry