题目内容
12．How often do the students count the birds？A．Once a year．
B．Twice a year．
C．Every two years．
分析 略
解答 略
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A．Once a year．
B．Twice a year．
C．Every two years．
题目内容
12．How often do the students count the birds？分析 略
解答 略
点评 略