Gap Fill - Paragraph One


  • Choose the correct word from the drop-down menus below.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.
  • After this paragraph, go to Paragraph 2.
   blood      cancer      extreme      mutations      past      radiation      risk      risk      samples      space  

Paragraph 1

Scientists have found a new to space travel. They have discovered that our DNA can change when going into . DNA mutations could increase the of space travellers getting . The scientists did research on 14 NASA astronauts who took part in the Space Shuttle programme between 1998 and 2001. The astronauts provided blood ten days before they went into space and three days after returning to Earth. The has been frozen for the 20 years. Professor David Goukassian said: "Astronauts work in an environment where many factors can result in...." He added: "Space ...means there is a risk that...mutations could develop."

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