1слово в каждом пункте scientists still aren’t sure whether the laws of physics allow us (0) build a time machine. some scientists argue that it’s (1 ) possible, using this logic: if we built a time machine and travelled back into the past, we (2 ) be able to stop our parents meeting. then we’d never be born! (3 ) , however, argue that that isn’t a real problem. we just wouldn’t be born in this universe, but we’d still be born in a parallel universe. strange, isn’t it? (4 ) want to travel into the past, it’s actually very easy. just look (5 ) the night sky. when you see a star in the sky, (6) you see it as it is right now? no, you see it as it was millions of years ago. this is (7 ) the light from the star has taken millions of years to travel across the universe to reach your eyes. travelling into the future is more difficult, but einstein proved (8 ) is theoretically possible. you can achieve this so (9 ) as you have a spaceship that goes really fast - nearly at the speed of light, ( is very fast indeed. if you go off in your spaceship and fly around for, let’s say, six months, when you come back (1 1 earth you'll be in the future. how much in the future? if your spaceship goes at 99.99% of light speed, all your friends you left behind (1 2 be almost 50 years older than you. it’s incredible, but it’s true!
1. im-(possible)
2. would
3. Scientists
4. If
5. up
6. do
7. because
8. it
9. easy
10. this
11. to
12. will