单项选择题

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A.entertain and advertise
B.educate and advertise
C.educate and entertain
D.be informative and instructive
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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.
单项选择题
The author of the passage is impressed by Hong Kong's ______.
A.Ocean Park
B.skyscrapers
C."street offices"
D.mix of old and new
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