Lucy is a _______girl. —Yes, she always studies hard at night.
How does your sister study English? –She studies by_________ tapes
The price of a cup of coffee is higher than _______ of a glass of Cola.
How long does it take to get to the airport?—Forty minutes. But it’s foggy today. I’m not sure the highway will closes soon. Let’s set off earlier.
A horse is _______ useful animal.