Could you please check my own sentences?
1. I lived in a dormitory between 1984 and 2004.
2. Learning English, which I find to be very difficult, can really help us to understand different cultures.
3. My father and mother live together with my older brother about 170 kilometres away from where I’m now living.
4. I’ve been trying to cut down alcohol ever since Sasha spoke to me about it a year ago.