单项选择题

The organization of the ants has the effect of______.

A．getting the most work done
B．dividing the work up systematically
C．each ant helping with all the tasks
D．each ant doing what it can do best
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单项选择题
Good (Para. 3, Line 1) refers to the ants'______.
A．co-operation in working
B．sense of responsibility
C．efficiency in working
D．willingness to work hard
单项选择题
It seems that smaller ants perform more of the______.
A．construction tasks
B．domestic tasks
C．defensive work
D．heavy work
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