单项选择题

Farmers can save a considerable amount of pesticide by ()

A. transforming poisoned rain
B. consulting infrared scanning experts
C. resorting to spot-spraying
D. detecting crop problems at an early date

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单项选择题
Plants will emit an increased amount of heat when they are ()

A. sprayed with pesticides
B. in pour physical condition
C. facing an infrared scanner
D. exposed to excessive sun rays
单项选择题
The expression make the most of in Line 4 is closest in meaning to which of the following()

A. Get the best yield from.
B. Raise the price of.
C. Exaggerate the worth of.
D. Earn a living on.
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