Don't throw rubbish everywhere． Building a civilized（文明的） school yard is our duty．
．（ ）
A．OK，I willB．You are joking
C．Take it easyD．Sorry， I won't
Don't throw rubbish everywhere． Building a civilized（文明的） school yard is our duty．
．（ ）
A．OK，I willB．You are joking
C．Take it easyD．Sorry， I won't
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