Answer:
1. Quiero nadar en el mar/lago/rio/ piscina (body of water) because nadar means swim and cine is movie theater
2. La playa/casa/anything with La that's near the ocean -
It says la película, the movie is near the Pacific Ocean which is technically not wrong but doesn't really make sense.
3. Maria va a la iglesia los lunes
4. Para escribir un informe, estudio en mi casa/ la escuela/ any place that makes sense for studying
5. Veo una película en el cine
6. Mi mama esta en casa/la cocina/ any place it makes sense to be in while preparing dinner
Hope this helps :)