单项选择题

In scores of experiments, scientists are changing the genetic endowments of plants and animals, and the results could______ a revolution in farm fields, feedlots and dairy barns.

A．Spawn
B．bring
C．instigate
D．plot
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单项选择题
Eating too much fat can ______ heart disease and cause high blood pressure.
A．attribute to
B．attend to
C．devote to
D．contribute to
单项选择题
The manuscript, circulated to publishers last month, ______an outburst of interest.
A．flared
B．caused
C．aroused
D．flashed
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