2a 部分答案
1. To search for/look for work in the cities.
2. I think they visit their hometowns once or twice a year.
3. Large hospitals or new schools.
(答案仅供参考)
2b 部分答案
1. search for 2. regard 3. opposite 4. according to sb.
5. return 6. developments 7. place
2c 部分答案
<1>hometown(s) <2>cities <3>return <4>year
<5>crayon <6>interested <7>government <8>good
<9>(will) never <10>memories