Comparatives and superlatives

Luxermburg is one of (a)   (rich) countries in the world.

I don't like my sister's bedroo as it is _ (a)   (dark) than mine.

Monday is (a)   (bad) day of the week.

Who is (a)   (powerful) person in your country?

Today's traffic is (a)   (slow) than yerterday's.

Tokyo is (a)   (crowded) than New York. The Japanese capital has more than 37.000.000 residents.

My niece is (a)   (friendly) than me.

El Chavo del 8 is (a)   (boring) than Harry Potter

It's very noisy in here; can we go somewhere_ (a)   (quiet)?

Iceland is (a)   (safe) country in 2022.