Gap Fill - Level 4


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   accommodation      airtight      capsule      company      enough      extension      hotels      initial      more      part      part      project      space      special      strong      tourism      tourists      week      wide      world's  
NASA has inflated a room as an to the International Space Station (ISS). It is four metres long and 3.2 metres . It took three days to inflate. The ISS crew must wait a to check if it is . The blow-up pod is of a test on using inflatable in space. The cost NASA $17.8 million. This test should lead to inflatable pods being used on the ISS.

The inflatable is the first blow-up capsule. It was designed and built by Bigelow Aerospace. The hopes to build for space . It is currently working on a to build two private space stations. These could be used as hotels in space by 2020. Inflatables could be a big of future space travel and . They are small to transport as airless units, but big and enough to live in.

Try the Level 5 gap fill.

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