Mark is his fourth son. -
This is her fourteenth letter. -
Yesterday he had his sixth exam. -
It's his third month here. -
Look at the second girl. -
He watched the first film. -
December is the twelfth month of the year. -
I live on the forty-eighth floor. -
Is "T" the twentieth letter of the alphabet? -
He doesn't like my second wife. -
We go to New York on the sixteenth of January -
Yesterday was the seventeenth of July. -
My parents bought the second flat. -
This is the twenty-fifth time I come here. -
Is this your fifteenth time in Paris? -
You tell me this for the tenth time! -
Is this your twentieth time in India? -
This writer lived in the twentieth century. -
This is the fiftieth floor. -
This is not the thirtieth floor. -