Put the verbs in brackets into the to-infinitive or the –ing form.
1. They have managed ___________ (gather) all their supplies in one week.
2. The trip is expected ___________(last) for two or three years.
3. Tanya has spent a lot of time __________(learn) about the solar system.
4. Their spaceship must avoid __________ (hit) asteroids and UFOs.
5. Their parents asked them if they had forgotten _________ (buy) enough dried food and e-books to take with them.
6. Phillip promises ___________ (help Tanya pilot their rocket ship.
7. We like ___________(explore) new planets and ________(see) new things.
8. Although their parents would prefer them _________ (remain on earth, they can see that it is no use __________(try) to get them to change their minds.
9. It’s too late now. There’s no point in ___________ (argue) with them.