单项选择题

Which of the following is most likely to be the subject of study by a geohydrologist

A．Soft, porous rock being worn away by a waterfall.
B．Water depositing minerals on the banks of a gorge through which the water runs.
C．Trapping of water in a sealed underground rock cavern due to an earthquake.
D．Water becoming unfit to drink through the release of pollutants into it from a plant.

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单项选择题Who built large brick pyramids______

A．The Mayas.
B．The Mochica Indians of Peru.
C．The Indians of Central Mexico.
D．The Indians of South Americ

单项选择题Which of the following is the writer implying in paragraph 5

A．self-criticism has gone too far.
B．communication is a more comprehensive category than language skills.
C．evaluating criteria are inappropriate nowadays.
D．this column does not meet the demanding evaluating criteria of today.

单项选择题Which of the following does the writer NOT suggest ______

A．subjects are no longer taught seriously
B．kids nowadays are encouraged to be self-critical
C．academic standards in schools nowadays are no longer high enough
D．the use of language has changed for the worse

单项选择题The writer's intention is to get us to ______.

A．rethink educational Strategies
B．confirm current trends
C．think about what constitutes communication
D．reassure parents

单项选择题How would you describe the writer's attitude towards current learning strategies

A．Distanced.
B．Admiring.
C．Objective.
D．Ironical.