The scientist’s many years’ careful observation ____ a surprising discovery.
#72756
A
ran into
B
began with
C
led to
D
came from
推荐题目
If you ______ your promise,the results will be sure to satisfy you.
#82786
A
carry out
B
carry on
C
keep up
D
make up
With a large amount of work _______, the chief manager couldn’t spare time for a holiday.
#70600
A
remained to be done
B
remaining to be done
C
remained being done
D
remaining to do