单选题
One machine can do as much work as ______.
A、
40% of the people
B、
4% of the people in the world
C、
40 people
D、
75 000 people
【正确答案】
C
【答案解析】
这是一道细节题。文中信息比较明显。倒数第2句One machine can often do the work of forty people表明，正确答案为C。
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