单项选择题

A．Once a week.
B．Twice a week.
C．Three times a week.
D．Four times a week.
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单项选择题
A．They both live in communities.B．They both have soldiers to defend their societies.C．They both show great capacity for learning.D．They both have a division of labor.
A．They both live in communities.
B．They both have soldiers to defend their societies.
C．They both show great capacity for learning.
D．They both have a division of labor.
单项选择题
A．They play against each other in order to get the best score.B．They want to get some exercises.C．They want to win a prize.D．They want to keep a score.
A．They play against each other in order to get the best score.
B．They want to get some exercises.
C．They want to win a prize.
D．They want to keep a score.
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