This is not the thirtieth floor. -
I finished my first book! -
I read the fourth book. -
He watched the first film. -
It's his third month here. -
Is "T" the twentieth letter of the alphabet? -
He doesn't have the fourth lesson today. -
This is not the eighth floor. -
This is my first pet. -
Is this your fifteenth time in Paris? -
Yesterday was her seventy-third birthday. -
He goes to the doctor for the third time. -
He finished his eleventh book. -
Today is the thirtieth of April. -
Tomorrow is her sixtieth birthday. -
It's my first week here. -
He lived in the eighteenth century. -
He took the twenty-third place. -
This is the fiftieth floor. -
She took the thirty-sixth place. -