Who is (tall) person in your family?
Who is (old) person in your family?
Who is (young) person in your family?
What is (interesting) subject at school?
What is (boring) film you have seen this year?
Who is (popular) actor in your country?
Who is (bad) singer in your country?
Which is (good) football team in your country?

the tallestthe oldestthe youngestthe most interestingthe most boringthe most popularthe worstthe best

The tallest, the oldest, the youngest, the most interesting, the most boring, the most popular, the worst, the best