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G
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Science moves forward ,they say, not so much through the insights of great men of genius as because of more ordinary things like improved techniques and tool.
单项选择题
Why did the author begin to doubt himself after the first year of his writing career
A．lie 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 didn't make any money.
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