10.4.7 For each gap 1-7, choose from the 3sentences A-H the one that best fits eachgap. One sentence is extra. Compare withyour partner. Justify your answers.A Humans would need to be self-sufficient tosurvive in space long-term.B The only question is whether this happens inyears, centuries or millennia.C Exploring space, however, is not without risk.D This costs a lot of money.E Nevertheless, Professor Hawking believes thatwe can afford to give 0.25% of the world'sfinancial resources to colonise space.F He believes that sooner or later we will be wiped outby a catastrophe such as a meteor or nuclear war.G That way, we could reach the next star to Earthin just 6 years.H However, even if we found the perfect planet, wemight not be able to get there at the moment.​