( )Tom's Tom,look()the dog behind the door Is it yous?No,it(
( )Tom's Tom,look()the dog behind the door Is it yous?No,it( )mine my dog is 帮帮忙 white lt looks( )lucy's lucy,is this your dog? Oh( ),it is mine ( )you are()you
(It's) Tom's.Tom,look (at) the dog behind the door.Is it yours? No,it (isn't) mine,My dog is white.It looks (like) lucy's. Lucy,is this your dog?Oh,(yes,) it is mine. 最后一句看不懂.