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Superlative sentences: IN or OF?
Focus Grammar
Description When comparing with a group, a superlative sentence can use IN or OF, depending on the situation. Let's practise that difference.
Instructions Complete these superlative sentences with the correct preposition
Gapped text Items
That's the most important company ______________________ the city of / in
Mount Everest is the highest mountain ______________________ the world of / in
My boss is the most important person ______________________ the company in / of
I'm the oldest ______________________ my brothers in / of
He's the coolest guy ______________________ town in / of
He's the best tennis player ______________________ Europe in / of
The kitchen is the coldest room ______________________ the house in / of
She comes from one of the richest families ______________________ Spain of / in
I'm the youngest ______________________ my family of / in
Mark is the oldest boy ______________________ class of / in
July is usually the hottest month ______________________ the year of / in
He's the biggest ______________________ all the boys in / of
He was nominated the most attractive man ______________________ the year in / of
These are the most beautiful flowers ______________________ the garden of / in
Spring is the best season ______________________ all in / of
My mother is by far the best mother ______________________ the world of / in
Mary's the tallest ______________________ her four sisters of / in
He's the best of all the actors ______________________ the film in / of
He's the best player ______________________ the team of / in
He's the most intelligent ______________________ my students in / of
Total number of items: 20
This is an activity from Multimedia-English

When comparing with a group, use the preposition IN (rarely "of")
     That's the highest building in the world
     You have the nicest room in the hotel
     The boss is the most important person in the company
     I'm the youngest in my family

But we can use the preposition OF before plurals and time expresions and "of all"
     He’s the biggest one of the boys
     Kevin is the most handsome of them
     This is the best day of my life
     July is usually the hottest month of the year