Question:
Underwater sports off the major islands and rocky islets of the FWI are the highlights of countless vacations.

Does it follow that "Vacations activties occur off the major islands of the FWI."?
Answer:
yes

Question:
Just for the sake of appearance, I let eight seconds pass.

Does it follow that "I didn't wait at all."?
Answer:
no

Question:
Ah, nothing.

Does it follow that "Okay, it's something. "?
Answer:
no

Question:
Your help has been of the most invaluable.

Does it follow that "You have given me a lot of important help."?
Answer:
yes