It's ten years since the scientist _______on his life's work of discovering the valuable chemical.
#83206
A
made for
B
set out
C
took off
D
turned up
推荐题目
The tourist industry has _______ a great number of different jobs.
#70886
A
invented
B
developed
C
discovered
D
created
Computers have been made ______ clever that they can ______ problems like humans _______. 
#74795
A
such; deal with; in some way
B
so; do with; in one way
C
such; do with; in the way
D
so; deal with; in a way