No, you do not need to use an apostrophe in "athletes" when referring to the plural form of the word. An apostrophe is only necessary to indicate possession (e.g., "the athletes' performance"). In general usage, simply writing "athletes" is correct.
'Athletes' is the plural of 'athlete'. However the apostrophe at the end (athletes') denotes possession also. Therefore it is a descriptive word. Put it in front of a noun to indicate that the noun belongs to a group of athletes.
after the t (it's) You put an apostrophe on 'its' if it's a contraction of "it is." Otherwise, 'its' has no apostrophe because that's its nature.
Put the apostrophe in mices right after s.: mices'
No apostrophe is to be putted in this sentence.
Personally, no. But it's not incorrect to put the apostrophe.
"Volkswagen" doesn't require an apostrophe.
no matter what you usually have to put a period after an apostrophe because it's the end of a sentence.
Aren't- The apostrophe replaces the 'o' in this circumstance.
won't (:
I'd
we'll
No.