Answers:
II.
1. /e/: better /ei/: train, plane.
2. /e/: best /ei/: great, way, railway, station.
3. /e/: let's, fresh, bread /ei/: take, break.
4. /e/: when /ei/: safety, obey.
5. /e/: friends /ei/: Jane, pavement, waving.
6. /e/: wet, weather, central /ei/: valley.
7. /e/: wedding, end /ei/: waiting, patiently.