The living conditions of this city ___ in the last few years.A.improveB.improvedC.had improvedD.have improved求教

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Thelivingconditionsofthiscity___inthelastfewyears.A.improveB.improvedC.hadimprovedD.haveimproved求教Th

The living conditions of this city ___ in the last few years.A.improveB.improvedC.had improvedD.have improved求教
The living conditions of this city ___ in the last few years.
A.improveB.improvedC.had improvedD.have improved求教

The living conditions of this city ___ in the last few years.A.improveB.improvedC.had improvedD.have improved求教
.Dhave been improved( improve 是及物动词)
in the last few years是现在完成时的时间状语

.have improved

improvedD.have improved