单项选择题


A．conscious
B．sensible
C．unknown
D．unaware
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单项选择题
Houses in Ica experienced terrible destruction during the El Nino event because ______.
A．the El Nino event was the strongest
B．the houses couldn't stand the flood
C．it seldom rained there
D．El Nino was unexpected
单项选择题
This passage is devoted to introduction to ______.
A．the causes and effects of El Nino weather phenomena
B．the worldwide monitoring network set up to predict El Nino
C．the relationship between the ocean temperatures and climate patterns
D．El Nino phenomena and destructive effects of one El Nino event on Ica
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