单项选择题

Farmers can save a considerable amount of pesticide by ______.

A．resorting to spot-spraying
B．consulting infrared scanning experts
C．transforming poisoned rain
D．detecting crop problems at an early date
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单项选择题
...People who die wondering, what if ( Line 3, Para. 3 ) refers to those ______ .
A．who think too much of the dark side of life
B．who regret giving up their career halfway
C．who think a lot without making a decision
D．who are full of imagination even upon death
单项选择题
According to the passage, the new wireless phone is characterized by ______.
A．a built-in camera
B．video games
C．a smart faceplate
D．theme-related ring tones
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