单项选择题

If we continue to ignore the issue of global warming, we will almost certainly suffer the ______effects of climatic changes worldwide.

A．dubious
B．drastic
C．trivial
D．toxic
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单项选择题
______from a distance, the island looked like a cloud.
A．Viewing
B．To view
C．Viewed
D．Being viewed
单项选择题
Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______of the quality of their products.
A．expansion
B．exposure
C．expense
D．expectation
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