单项选择题

Passage Two
Questions 29 to 31 are bused on the passage you have just heard.

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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单项选择题
A．A scarcity of jobs in their field.B．Inadequate training in methods of biological research.C．Difficulties in classifying all of the varieties of owls.D．A lack of funding for their work with endangered species.
A．A scarcity of jobs in their field.
B．Inadequate training in methods of biological research.
C．Difficulties in classifying all of the varieties of owls.
D．A lack of funding for their work with endangered species.
单项选择题
A．American industrialists.B．French economists.C．International leaders.D．Civil War veterans.
A．American industrialists.
B．French economists.
C．International leaders.
D．Civil War veterans.
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