题目内容
47. ___
A. The increase in beachfront property value.
B. An experimental engineering project.
C. The erosion of coastal areas
D. How to build seawalls.
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48. ___
A. To protect beachfront property.
B. To reduce the traffic on beach roads.
C. To provide privacy for homeowners.
D. To define property limits.
49. ___
A. By sending water directly back to sea with great force.
By reducing wave energy.
C. By reducing beach width.
D. By stabilizing beachfront construction.
50. ___
A. Protect roads along the shore.
Build on beaches with seawalls.
C. Add sand to beaches with seawalls.
D. Stop building seawalls.
40. ___
A. Problems with pesticides.
B. Characteristics of one type of falcon.
C. Migratory patterns of birds.
D. Tracking systems for animals.
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