Answer:
mi madre dormía profundamente.
Explanation:
This Is the answer because it translates to My mother was sleeping soundly. and it is the only one that has the correct grammar.
Answer: Acabas de llegar a mi casa (or whatever destination you picked)
Explanation: Hope this helps :)
Repeating the word(s) over and over, writing them and listening to them.
If it's a specific sentence, you can record yourself saying it and repeat it.
As for learning Spanish in general, try doing all those things I said before AND listening to movies in Spanish with subtitles.
Good luck!
Can you give more detail so I can help you please