Задание

Choose the correct form of the verb to fill the gaps. Use a gerund or the infinitive form of the verb.

When looking at a human face, we look left without it.

Scientists wanted to find out if dogs use the same trick human faces.

Scientists thought only humans had a left-gaze bias until they started at dogs.

the ability to detect human emotions is unique to dogs.

There may be a biological advantage in to read people's emotions.

It makes sense for a dog a person when the person is smiling.