by the promise of these tiny tubes, people are already working to turn the Space Elevator into a reality. 单选题 (10 分) 10分 A. To fuel B. Fueling C. Fueled

by the promise of these tiny tubes, people are already working to turn the Space Elevator into a reality.
单选题 (10 分) 10分
A.
To fuel

B.
Fueling

C.
Fueled

出自：国家开放大学理工英语4

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