Task 1. For each gap 1-7, choose from the sentences A-M the one that best fits each gap. One sentence is extra. Compare with your partner. Justify your answers. A. Humans would need to be self-sufficient to survive in space long-term.
B. The only question is whether this happens in years, centuries or millennia.
C. Exploring space, however, is not without risk.
D. This costs a lot of money.
E. Nevertheless, Professor Hawking believes that we can afford to give 0.25% of the world's financial resources to colonise space.
F. He believes that sooner or later we will be wiped out by a catastrophe such as a meteor or nuclear war.
G. That way, we could reach the next star to Earth in just 6 years.
H. However, even if we found the perfect planet, we might not be able to get there at the moment.
Task 2. Fill in: self-sufficient, overcome, warm up, afford, release.
1. Eventually, they managed to… their problems.
2. The ISS isn't… because it can't produce or make everything that it needs.
3. Climate change could… the Earth by 3°C by 2100.
4. Power stations… carbon dioxide and other greenhouse gases into the atmosphere.
5. Only the world's richest can… a space tourist, it costs about $20 million!
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