1. people don't know that much about outer space. A great deal of
Few
Each
2. I'd like to see the film before I buy it. *
few
enough
a bit of
3. friends of mine want to be aerospace engineers. *
Whole
A little
A few
4. There is interest in space exploration these days. *
a lack of
several
all
5. We need to check part of the spacecraft carefully before launching . *
several
much
each
1)А,2)enough,3)Whole,4)all,5)much