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touseinJanuary,2010,theroadhassolvedthelongstandingproblemoftrafficjamsofthisarea.[]A.PutB.PuttingC.HavingputD.Beingput

题目详情
______ to use in January, 2010, the road has solved the longstanding problem of traffic jams of this area.
[     ]
A.Put  
B.Putting
C.Having put  
D.Being put
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答案和解析
A