I strongly believe that space travel will become a reality for many people in the future. With rapid advancements in technology, companies like SpaceX are already making progress in reusable rockets. In the next few decades, the cost of flying into orbit will likely decrease, making it accessible not just to astronauts but also to tourists. Moreover, as Earth faces environmental challenges, exploring Mars or the Moon might become necessary. Although there are still many risks and high costs involved, I am optimistic that space tourism will eventually be as common as air travel today.

1. Marcus wanted to know how many people would come the day after

2. People will communicate with each other using telepathy in 50 years′ time

1. Janet told him (that) he could leave his bags there for a few minutes

2. My dad asked me where I was going with my friends the following week

3. It took my brother an hour to fix my broken webcam