Vienna was a rich city ______.

A．To understand Vienna, one must know its trade.
B．After World War I , about 7 000 000 people lived in Vienna.
C．Green woods, mountains and a large river surround Vienna and make it a beautiful city.
D．Vienna musicians did little to make Vienna a city of spirits.

A．beef and chicken
B．chicken and vegetable
C．fried potatoes and pork
D．vegetable and fruit