It depends on what follows instructors.
Plural
Your parents met with your instructors.
Possessive Plural
Your instructors' expectations included that every student will succeed.
This depends on the rest of the sentence E.g. Your instructors are happy with your progress or Your instructor's watch has gone missing, have you seen it? or Your instructors' meeting was a waste of time as none of them brought their notes
Yes. The phrase means the honorees of this year.
Yes as it is the possessive form. As the phrase is referring to just one of the names in the partnership, the apostrophe should be placed thus:- PARTNER'S NAME If instead you had been asking about all of the names in the partnership, the apostrophe should be placed thus:- PARTNERS' NAMES
Yes. McCain has ownership over his place of employment. An apostrophe is required.
If the '24' in question is a player on a team wearing the number 24 then yes, you need an apostrophe in "24's Mom." The apostrophe in that position indicates the 'Mom' belongs to 24.
No, there is no apostrophe in the phrase "21st century."
The apostrophe belongs in the phrase as "the glasses' rim" to indicate that the rim belongs to the glasses.
I am does not need an apostrophe. It is only when you make it into a contraction by dropping the a that you need the apostrophe. It becomes I'm in that situation.
In the phrase "we have," there is no apostrophe. However, if you use the contraction "we've," the apostrophe is placed between the "e" and the "v" to indicate that the "ha" in "have" has been omitted.
No. The Cannons doesn't need an apostrophe.
No, Christmas Eve does not need an apostrophe.
Yes. However, it would depend on whether it is owned by a fuzzy farmer (1), or a number of fuzzy farmers (e.g. 7). If singular, it would be Fuzzy Farmer's Market If plural, it would be Fuzzy Farmers' Market.