1. doctors, gene therapy, lifestyle, microscopic computers, pollutionrelated disease
2. 1 just / only
2 because
3 almost
4 or
5 well / already
6 think / believe / predict
7 in
8 much
9 likely
3. 1 to 4 as
2 likely 5 of
3 chance / possibility
4–5. Students’ own answers