A puzzle from OPUS VIII

Question

I just got a mail from an online puzzler who calls himself OPUS VIII. He said he wants to see if I have what it takes to become a member of his secret online puzzle club. He said it's time limited and that he'll send a mail when the time is up. I have no idea who he is or how he got my email, maybe from a friend of a friend who knows I like puzzles.

Well, anyways... here's the puzzle he sent.

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"Damn, those basketball players are really ....."

".....! I don't want it"

"School is so boring, always end up .....dreaming whenever we have class."

"Well it's too late now, the store is ....."

"Come on, try to have some ..... thinking man, it'll be fine."

"You know, back in the good ..... days this would never happen."

"No ..... no cry, was a great song"

"Their defence is not that good, it's definitely their ..... link."

Tell me the answer. You only have one try so remember to give me the correct one ;)

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Quick! What answer should I send to him in order to become a member of the club?

Answer 1

The answer is:

antonyms.

First ...

... fill in the blanks. This is straightforward:

"Damn, those basketball players are really tall"
"No! I don't want it"
"School is so boring, always end up daydreaming whenever we have class."
"Well it's too late now, the store is closed"
"Come on, try to have some positive thinking man, it'll be fine."
"You know, back in the good old days this would never happen."
"No woman no cry, was a great song"
"Their defence is not that good, it's definitely their weak link."

Then ...

... find antonyms, words that mean the opposite of each word:

tall — short
no — yes
day — night
closed — open
positive — negative
old — young
woman — man
weak — strong

Their first letters spell synonyms – so going with the theme, the answer should be its antonym, viz antonyms?

A hint is given ...

... by the mysterious puzzlers name, Opus VIII, which sounds (a bit) like "opposite".