We have(Present Simple) a lot of space cities.The City of Stars is(Present Simple) one of them.It is(Present Simple) a very big city.Two thousand people live(Present Simple) here.There are(Present Simple) two spaceports in the city.The first one is(Present Simple) the main one and the second is(Present Simple) an emergency one.You can get(Present Simple) to any place in the city by teleportation or by railroad.The teleports are(Present Simple) in every area.People travel(Present Simple) by teleportation.The railroad is(Present Simple) for transporting things. We want(Present Simple) people to have(infinitive) a comfortable,healthy life in the city.There is(Present Simple) a big zero-gravity sports centre and a stadium.People can play(Present Simple) space volleyball, basketball or other games here. There are(Present Simple) a lot of factories in the city where robots work(Present Simple). Rockets take(Present Simple) minerals from nearby planets to the factories,and the factories make(Present Simple) many useful things (эта строка здесь должна быть?) If unfriendly alien spaceships come(Present Simple) to the city,the lasers will exterminate (Future Simple) them..The city Stars has also got(has got - present Perfect) factories,where robots and rockets are made (Present Simple, Passive Voice) and repaired(are repaired - Present Simple, Passive Voice). Nothing is thrown(Present Simple, Passive Voice) away in our city,everything is recycled(Present Simple, Passive Voice). Lasers defend(Present Simple) the city.