— Miss Lin _____ my desk-mate with her lessons when I left school. —She is really a nice teacher. A. helps B. is helping C. was helping
---Is this _________backpack? -----No, it isn’t. It’s _________ backpack.
____, what’s this in English?
These _______ her parents. That _______ her sister.
---What’s this _____ English? ---It’s an eraser.
Two and four is________.