单项选择题

A. Because mountainous regions have a very rich biology.
B. Because they can move uphill to get cooler.
C. Because there are no deserts in mountainous regions.
D. Because they need a warmer environment to survive.
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A. 12 weeks. B. 6 months.C. 8 months. D. 2 years.
A. 12 weeks.
B. 6 months.
C. 8 months.
D. 2 years.
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A. Christ’s last supper. B. A popular film. C. A legendary story. D. A local custom.
A. Christ’s last supper. B. A popular film.
C. A legendary story. D. A local custom.
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