45. ___
A. People wording in a large factory.
B. People walking on crowded city streets.
C. An everyday activity in a small town.
D. A well-known historical event.
46. ___
A. The populations of small towns increased rapidly.
B. Art critics in cites began to take notice of regionalism.
C. Some regionalist painters began a new art movement.
D. Society became more internationally focused.
47. ___
A. She was asked to lead a group of inexperienced cavers there.
B. It was the first cave that she had ever visited.
Clearly marked trails mode it easy to explore.
D. She hoped to make a discovery.
48. ___
A. It’s easy to locate.
B. It’s in a very windy area.
C. It’s exceptionally beautiful.
D. It’s partially covered by water.
49. ___
A. They are more likely to damage the cave.
B. It’s hard for them to stay awake.
C. They tend to break their equipment.
D. They may imagine seeing things that aren’t really there.
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