Choose the correct options to complete the sentences

1. I've never seen such a cute robot dog before! Do you know who [invented|discovered] it?
2. These doors are [artificial|automatic]. You don't have to open them yourself.
3. James asked his teacher for help because the task was too [complicated|exact] for him.
4. Their invention helped to [decrease|fascinate] the price of this material.
5. If you want to [estimate|measure] the length of this road, you need to use kilometres or meters.
6. We don't know the [artificial|exact] time of the meeting yet. It will take place around 2 p.m.
7. The inventions of Leonardo da Vinci really [estimated|fascinated] him. That's why he was so interested in the book about this inventor.