用适当的介词填空in/on/under/behind/to/of/nexttoAcatisthetreeManybananasarethetreeSomepicturesarethewallLiLeiisdutytodayIcan'tseethedog.It'sthedoorAredbikeisthetreeWho'sthephotoThereisadoorthewallWelco

　　用适当的介词填空in/on/under/behind/to/of/nextto

　　Acatisthetree

　　Manybananasarethetree

　　Somepicturesarethewall

　　LiLeiisdutytoday

　　Ican'tseethedog.It'sthedoor

　　Aredbikeisthetree

　　Who'sthephoto

　　Thereisadoorthewall

　　WelcomeHangzhou

　　Thisisaphotomyfamily