1. 'I'm living in London.'

We use present continuous tense when we talk about events that are happening right now.

2. He uses present simple because the questions are about his habits, routines and daily life.

3. 'Where are you from?'

    'Where are you living now?   

    'What's the weather like today?'

    'Where do you work?'

    'How many people are ther where you work?'

    'How old is the restaurant?'

    'Do you like your job?'

    'What do you do when you finish work for the day?'

    'What is your favourite free-time activity?'

    'How often do you go to the cinema?'

    'Can you play any musical instruments?'

    'Are you in a band?'

    'How often do you go out with friends?'

    'What do you want to do now?'