Ответ:

    1. Our friends are staying at the hotel because their house isn’t ready.
    2. We stay at this hotel every summer because it’s close to the beach.
    1. Are you talking about my new film?
    2. Do they always talk about films?
    1. Close the window, please. The wind is blowing.
    2. Strong winds often blow near the ocean.
    1. It’s time to go to bed. What are you writing?
    2. I write letters to my aunt once a week.
    1. What language do they speak in Belgium?
    2. Listen! What language are those people speaking?
    1. Who is coming to tea?
    2. Do they come here every weekend?
    1. I’m busy. I am planting an apple tree.
    2. She plants flowers every spring.

Present Continuous употребляется для действия, происходящего сейчас или в текущий период; Present Simple — для привычек, регулярных действий и общеизвестных фактов.