________________?(your,backpack) yes,it is .

问题描述:

________________?(your,backpack) yes,it is .

Is it your backpack? yes, it is.

Is it your backpack?

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:)