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单项选择题


Questions 29 to 31 are based on the passage you have just heard.

A．Pollution of the environment.
B．A new generation of pest killers.
C．Over-killing by hunters.
D．Destruction of their natural homes.
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单项选择题A．Only one out of four girls cries less often than boys.B．Of four boys, only one cries very often.C．Girls cry four times as often as boys.D．Only one out of four babies doesn’t cry often.

A．Only one out of four girls cries less often than boys.
B．Of four boys, only one cries very often.
C．Girls cry four times as often as boys.
D．Only one out of four babies doesn’t cry often.

单项选择题A．The son.B．The father.C．The mother.D．Aunt Louise.

A．The son.
B．The father.
C．The mother.
D．Aunt Louise.

单项选择题A．Most Londoners were frightened.B．Most Londoners became rather confused.C．Most Londoners took Exercise Floodcall calmly.D．Most Londoners complained about the trouble caused by Exercise Floodcall.

A．Most Londoners were frightened.
B．Most Londoners became rather confused.
C．Most Londoners took Exercise Floodcall calmly.
D．Most Londoners complained about the trouble caused by Exercise Floodcall.

单项选择题A．Not clearly specified.B．Not likely to be met.C．Reasonable enough.D．Apparently nonexistent.

A．Not clearly specified.
B．Not likely to be met.
C．Reasonable enough.
D．Apparently nonexistent.

单项选择题A．They found ways to speed up the reproduction of bald eagles.B．They developed new types of feed for baby bald eagles.C．They explored new ways to hatch baby bald eagles.D．They brought in bald eagles from Canada.

A．They found ways to speed up the reproduction of bald eagles.
B．They developed new types of feed for baby bald eagles.
C．They explored new ways to hatch baby bald eagles.
D．They brought in bald eagles from Canada.