ex. 3.put the verbs in brackets into the to-infinitive or the –ing form.

they have managed (gather) all their supplies in one week.

the trip is expected ) for two or three years.

tanya has spent a lot of time ) about the solar system.

their spaceship must avoid (hit) asteroids and ufos.

their parents asked them if they had forgotten (buy) enough dried food and e-books to take with them.

phillip promises (help tanya pilot their rocket ship.

we like ) new planets and ) new things.

although their parents would prefer them (remain on earth, they can see that it is no use ) to get them to change their minds.

it’s too late now. there’s no point in (argue) with them.

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