单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．When the ecological balance of the river is lost.
B．When people consume more fish than they used to.
C．When large numbers of algae, fish and birds are killed.
D．When the production of marine petroleum is increased.
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单项选择题
A．That they were both famous actresses.B．That they were both popular ail their lives.C．That they were both rich and kind-hearted.D．That they were both successful when very young.
A．That they were both famous actresses.
B．That they were both popular ail their lives.
C．That they were both rich and kind-hearted.
D．That they were both successful when very young.
单项选择题
A．For an easy grade.B．To follow his father.C．To change his specialty.D．For knowledge of poetry.
A．For an easy grade.
B．To follow his father.
C．To change his specialty.
D．For knowledge of poetry.
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