Green is usually regarded as a __________ of life while red stands for joy and victory. A. symbol B. sign C, mark D. signal
______ in the fields on a March afternoon, he could feel the warmth of spring.
______ different kinds of pianos, the factory is sure they can satisfy people’s need.
______, most teenagers now listen to rock music. However, John likes classical music better.
The city ______ by an army of 600 men was difficult to take.
At the meeting they discussed three different ______ to the study of mathematics.