Complete with the right plural of the compound nouns

1. The elderly spend most of their time looking at the passer-bys passers-by passers-bys/passers-by .
2. Does this hotel allow early checks-in check-ins check-ins/checks-in ?
3. The association planted some apples tree apple trees apples tree/apple trees .
   
4. The relationship between women and their mother-in-laws mothers-in-law mothers-in-law/mother-in-laws is often fraught.
5. Are there any shoe shops shoes shop shoe shops/shoes shop nearby?
6. Take two spoonfuls spoonsful spoonfuls/spoonsful of honey before you go to bed.
7. I have two penfriends pensfriend penfriends/pensfriend from the UK.
8. Get off after two buses stop bus stops bus stops/buses stop
9. She bought two tool boxes tools box tool boxes/tools box .
10. They are goods-for-nothing good-for-nothings good-for-nothings/goods-for-nothing who never take responsibilty for their lives.