Of all the sports shoes, Peter bought     pair. Then he had some money for socks.

31. – How did your father catch so many fish?– By using a ________. 

After two years’ research, we now have a ________ better understanding of the disease. 

Would it be ___________ for you to pick me up at four o'clock and take me to the airport?

 She can speak _______ in front of Mack, but she can’t eat ______ in his restaurant.