Answer:
11. join
12 well to do
13 Unlike
14 employment ( i think this one is right but not sure due to how it sounds)
15 don't know this one / not sure
16 Obedient
17 Supportive
18. Join
19 Security
20. night shift
Explanation:
27. Personification
28. Onomatopoeia
the letter was poster by his father