Such and such a piece of information

Test No. [color=blue]incompl/advan-39 “State Secrets”, question 1

We often hear that such and such a piece of information cannot be released into the public in the interest of national security.

(a) dominion
(b) domination
© domain
(d) domestic

Test No. [color=blue]incompl/advan-39 “State Secrets”, answer 1

We often hear that such and such a piece of information cannot be released into the public domain in the interest of national security.

Correct answer: © domain

Your answer was: [color=green]correct
[size=200]_________________________[/size]

what does the “such and such” phrase mean?

such and such a piece of information = various pieces of information[YSaerTTEW443543]

TOEIC listening, photographs: House painting[YSaerTTEW443543]

The public domain in the given context means people who follow the news and current events in their country.[YSaerTTEW443543]

TOEIC listening, photographs: Mailing letters[YSaerTTEW443543]