Questions 11–17: identify the correct possessive form. 11. his sister’s-in-law/sister-in-law’s letter came as a surprise to chuck. 12. arizona’s/arizonas’ climate is dry. 13. she is writing a paper on byron and shelley’s/byron’s and shelley’s poems. 14. i met a man whose/who’s sister i know. 15. it’s too bad that the dog’s/dogs’ foot got hurt. 16. smith’s/smiths’ house is red. 17. kevin and mike’s/kevin’s and mike’s parents, arthur and alice brooks, are both scientists.

11. His sister-in-law’s letter came as a surprise to Chuck.

The compund noun is not separated. The 's is added to the end of the noun.

12. Arizona’s climate is dry.

The possessive of a singular noun is formed by adding an 's to it.

13. She is writing a paper on Byron’s and Shelley’s poems.

Since the poems belong to two separate people--they did not compose them together, so this is not shared ownership--the 's goes after each of their names.

14. I met a man whose sister I know.

Who's is a contraction meaning "who + is", expressing "what or which person or people". Whose is a possessive pronoun.

15. It’s too bad that the dog’s foot got hurt.

This is the same case as number 12.

16. Smith’s house is red.

If a singular noun ends in s, the rule is to also add 's. The only time a noun ending in s will only have an apostrophe added is when is plural. So in this case it could only be Smith's or Smiths's, depending on the name, since it's not a plural noun.

17. Kevin and Mike’s parents, Arthur and Alice Brooks, are both scientists.

Kevin and Mike share the same parents. As this is a shared possessive, the 's goes at the end of the last name.

faithful servants eumaeus and philaetius:

his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed:

these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.