________________?(your,backpack) yes,it is .
问题描述:
________________?(your,backpack) yes,it is .
答
Is it your backpack? yes, it is.
答
Is it your backpack?
答
Is this your backpack 这是你的双肩背包吗?Yes,it is .是的
要是没有记错的话,这好像是七年级的英语教科书上有:)