What’s thirty and fifteen —It’s _______.

Could we buy a piano, Jack—I’m afraid there ______ enough room for one in the house.

_______ do you water the flowers— Once a week. These flowers don’t need much water.

e of the continuous bad weather, the buildingwork of the bridge over the Yangtze River is far behind

All of the football fans around the world are looking forward to the coming World Cup.