This is the thirty-first floor. -
This is not the thirtieth floor. -
He travels alone for the first time. -
She bought the fifty-fifth dress. -
Her shop is the third to the left. -
It's his forty-fifth birthday. -
She lived in the thirteenth century. -
Mark is his fourth son. -
Yesterday was the seventeenth of July. -
It's our fifth year here. -
I cook this pizza for the tenth time. -
It's my fiftieth birthday. -
Yesterday he had his sixth exam. -
My birthday is on the nineteenth of January. -
He watched the first film. -
Is this the eightieth floor? -
You go to Italy on the fourteenth of July. -
This is the thirty-third time you tell me this story. -
Kate is her third daughter. -
Yesterday was her seventy-third birthday. -