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单选题
There are three colors in the British flag, _____ red, white and blue.
A

rarely

B

namely

C

really

D

naturally

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参考解析
解析：
句意：英国的国旗有红色、白色和蓝色三种颜色组成。本题考查连词用法。前面说“英国国旗有三种颜色”，后面接着给出了具体颜色，前后是一种解释说明的关系。namely的意思是“也就是说，具体来说”，符合题意。答案选B。
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