8.
that he/she drives (subjunctive) OR you drive (formal
10.
he/she believes OR you believe (formal)
11.
you believe (informal)
20.
sleeping (he/she is sleeping / they are sleeping)
25.
alien / extraterrestrial
32.
UFO (unidentified flying object)
33.
UFO port / UFO airport (imaginary word)
35.
he/she wants OR you want (formal)
41.
on / about / over (depends on context)