.His conclusion, ______ on careful research, was acceptable.
#97024
A
to base
B
to be based
C
basing
D
based
推荐题目
More than 200 dead pigs       in the waterways have raised urgent concern.
#91253
A
found
B
being found
C
to be found
D
having found
________the working efficiency,the boss allows the employees to have a coffee break.
#88719
A
Improving
B
To improve
C
Having improved
D
Improved
The missing boy was last seen_____ near the East Lake.
#94799
A
playing
B
play
C
played
D
to play