单项选择题

In order to apply pesticide spraying precisely, we can use infrared scanning to ______.

A．estimate the damage to the crops
B．draw a color-coded map
C．measure the size of the affected area
D．locate the problem area
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单项选择题
What can be concluded from the passage
A．Genuine writers often find their work interesting and rewarding.
B．A writer's success depends on luck rather than on effort.
C．Famous writers usually live in poverty and isolation.
D．The chances for a writer to become successful are small.
单项选择题
Why did the author begin to doubt himself after the first year of his writing career
A．He wasn't able to produce a single book.
B．He hadn't seen a change for the better.
C．He wasn't able to have a rest for a whole year.
D．He found his dream would never come true.
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