—Is this red bag yours?—No, it isn’t.          is that black one.

___ do you call that in English?

I found a story-book on the desk, it isn’t mine, it is ___,I think.

It’s not my English book. Maybe it’s         .

—Eric, are your parents angry about your English in this exam?—Oh,            of them is angry. They just told me to get better grades next time.