写出所给单词的复数形式subwaytunnelhighwaypierphotoharbourfactorybridgebuildingthis

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写出所给单词的复数形式
subway
tunnel
highway
pier
photo
harbour
factory
bridge
building
this

subways tunnels highways piers photos harbours factories bridges buildings these
楼上 photo 的复数写错了应该加 S .其他的对、

subways tunnels highways piers photoes harbours factories bridges buildings these

subways,
tunnels
highways
piers
photos
harbours
factories
bridges
buildings
these