Infinitive vs Gerund

I should __________my teeth every day.

Mary decided___________part in the competitions.

I can't stand__________German.

You had better ___________to the shelter.

Can you ___________some buns for me?

I would like_________to the zoo.

Jessica began ______________native speakers.

People complain of _________of this store.

They are accused of __________money.

She was astonished at the _____________view from the mountaintop.

They were indignant at___________ this restaurant.

Alice is busy in_____________ her house.

I am pleased at___________ in the UK.

We ought___________ about it.