Gerund or infinitive?

Front

We stopped ______ my sister.

Back

to pick up

Front

We stopped _____ our old printer.

Back

using

Front

I recommend everyone _____ this movie.

Back

watching

Front

My friend volunteered _____ in the animal shelter.

Back

to help

Front

I decided _____ this challenge.

Back

to take up

Front

You promised me _____ a picture of us.

Back

to upload

Front

You'd better avoid _____ in this neighborhood.

Back

walking

Front

She refused _____ her homework at the weekend.

Back

to do

Front

He suggested _____ to the cinema together.

Back

going

Front

Try _____ Quizlet to memorize more words.

Back

using