Gerunds or infinitives?

She prefers (to read / reading) novels in the evening

(To swim, Swimming) is so relaxing, I do it three times a week

He offered (to help / helping) us with the project.

They agreed (to go / going) to the concert together.

She likes (to dance / dancing) at parties.

We need (to buy / buying) groceries for dinner.

She enjoys (to read / reading) books in her free time.

1. Mr. Harris enjoys _________ people out to dinner. (inviting / to invite)

I can't afford (to lose / losing) my phone.

1. Don't waste my time ___________ about your salary. (complaining/ to complain)