subway line 4,put into use in september 2009,has made travel

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subway line 4,put into use in september 2009,has made traveling in biejing
subway line 4,(put) into use in september 2009,has made traveling in beijing easier.
a.having been put怎么错了

看时态.
4号线2009年投入使用.所以应该是一般过去式,没有必要用现在完成时的.

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