10.The new suspension bridge _________ by the end of last month.A.has been designed B.had been designed

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10.The new suspension bridge _________ by the end of last month.A.has been designed B.had been designed
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10.The new suspension bridge _________ by the end of last month.A.has been designed B.had been designed
10.The new suspension bridge _________ by the end of last month.
A.has been designed B.had been designed

10.The new suspension bridge _________ by the end of last month.A.has been designed B.had been designed
B.had been designed

B
因为上个月底已经设计完了，所以用过去完成时

by the end of 是过去完成时的标志

the new a year ,the new sta The new majority . read the new words this is the new the new forwarding agent Write the new the new century primary coint the new books in the new write the new words New Chick on the 求《The new Diana》 to welcome the New points the new begin the new life the new clssic fashion welcome in the new the king“new clothes