Choose the right words

1. The interns gain some
   [realistic|practical]
   skills while working in a laboratory.
2. We have to buy and use
   [long-lasting|never-ending]
   lamps that work more hours.
3. Mark is so ambitious to
   [reaching|managing]
   his future goals.
4. Jessica spent so many hours to
   [contribute|achieve]
   the final prosperous invention.
5. My dad has been working all day. He
   [dropped|fell]
   into a
   [deep|heavy]
   sleep at home.