The astronaut______ the space station．He came back last week．

A．has been to    B．has gone to    C．have gone to    D．have been to

I'll live ________ a space station.

1. A.
   in
2. B.
   on
3. C.
   at
4. D.
   to

I'll live ________ a space station.

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I'll live ________ a space station.

[　　]

I'll live ________ a space station.

[　　]