Что подчеркнуть?
it's an/a eraser.
John am/is not new to the school.
This is an/a atlas.
it's an/a notebook.
Mark 'm/'s my best friend.
Fiona 's/'re in Class 2C.
This is an/a ruler.
Bill and Nim is/are in the same class.
you 'm/'re in Grade 6.
I 're/'m in secondary school.