Read the sentences. Put in a word from the same 'word family!
1. The alien sent a message to her planet with a large ... (to transmit)
2. A trip to the moon would be ... (to forget)
3. On a space station, ... means that everything floats. (weight)
4. There is lots of ... for astronauts before they go into space. (to train)
5. They talk to scientists ... (regular)
6. ... can be a problem on the ISS. (lonely)​