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Yes, it is correct to hyphenate "modern-day" when it is used as an adjective to describe something that pertains to the present or current time period. For example, "modern-day technology" or "modern-day issues."
the alberta legislative biuldings
Iran, the Vatican.
Abortion. Whether it is right to do or not.
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Dollars, yen, pounds, etc.
A Leninist One-Party State.
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The creator coco channel.
Do you mean fractions? There are pizzas which is an example.
Yes for example there are gravesAlso there are the remains of ancient tombs.