Вопрос по английскому языку:

Write the correct form of the adjective in brackets.
This is Sarah Jones and her brother, Mike. Sarah is e.g. shorter (short), than Mike, but he is 26)....................... (young) than her. He is the 27)....................................... (young) student in his class. They are both intelligent but Sarah is 28)...................................... (intelligent) than Mike. Sarah is the 29)............................ (intelligent) girl in her school. Sometimes they argue, but Sarah thinks Mike is the 30).............................. (good) brother in the world.