10.The new suspension bridge _________ by the end of last mo

10.The new suspension bridge _________ by the end of last mo the new suspension bridge(had been designed)by the end of la 选时态：The new suspension bridge________ by the end of next mon by the end of last month ,they___(build)five bridge By the end of last year,another new subway__in shanghai. by the end of last 13.By the end of last week,they __D__ the bridge. A new bridge _________ (build) over the river last year. TESTNINE 17.by the end of next month,the bridge by the end of last year,another new gymnasium ___ in beijing By the end of last year,a new subway line to Beijing West St By the end of last month中的by是什么意思?