Дополните предложения с «если» о путешествии к звездам, используя правильные формы глагола:
1. I would never return to the Earth if I (go) to another planet.
2. If he went to another planet, he (miss) his friend.
3. If we had more money, we (buy) some better equipment for our experiment.
4. If we could travel to the stars, the biggest problem (be) the distance.
5. If Spaceship X travelled at one million kilometers an hour, it (reach) Barnard’s Star in six thousand five hundred years.
6. If we (want) to reach Barnard’s Star in less than a human lifetime – say, fifty years – the spaceship would travel at one hundred and thirty million kilometers an hour.
7. The astronauts (take) air, water, clothes, food in the spaceship if they travelled to the stars.
