They're all correct except # 10.
Also -- stepchildren is one word.
Please check these for me:
Write the plurals of the following singular words.
1. hero : heroes
2. sheep : sheep
3. sister-in-law : sisters-in-law
4. journey : journeys
5. princess : princesses
6. spoonful : spoonfuls
7. victory : victories
8. stepchild : step children ?
9. memo : memos
10. Englishman : Englishmens
thanks for checking
3 answers
Sorry, accidentally put s at the end of Englishmen
:-) Right -- Englishmen