单项选择题

A．By sending water directly back to the sea with great force.
B．By reducing wave energy.
C．By reducing beach width.
D．By stabilizing beachfront construction.
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问答题
S2. The author says that a natural concern of the Establishment is to _______________
单项选择题
A．Members have a narrow range of topics to discuss.B．Members bring up the most important issue.C．Members have little knowledge.D．Members have interesting topic.
A．Members have a narrow range of topics to discuss.
B．Members bring up the most important issue.
C．Members have little knowledge.
D．Members have interesting topic.
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