Lance Bass wasn’t able to go on a tour of space because of health problems. [br]

游客2023-09-18  14

问题 Lance Bass wasn’t able to go on a tour of space because of health problems. [br] Within the next two decades, ______ could be as common as intercity air travel.

选项

答案 space travel

解析 本题空白处问“在未来二十年内,什么将会和城市间的空中旅行一样常见”。相关部分在文中第十七段,提到“在未来二十年内,宇宙飞船飞往月球的次数将和纽约一洛杉矶的航班数一样”。即会非常常见。因此,答案为 space travel。
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