A imaginatively B recently C carefully D unscientifically E accidentally F satisfactorily Schaefer successfully made a field ex

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问题 A imaginatively
B recently
C carefully
D unscientifically
E accidentally
F satisfactorily
Schaefer successfully made a field experiment on rainmaking after planning______

选项

答案C

解析 答案的依据在第七段:After planning carefully,Schaefer made an experiment by dropping dry ice from his plane to the clouds below him.As was expected,snow formed and fell from the bottom of the cloud.Schaefer succeeded。
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