① Is her telephone number 027-82453 Yes,it is .No,it isn't .
② Is that boy Eric?Yes ,he is .No,he isn't .
③ Is it her pen Yes ,it is .No,it isn't .
① Is her telephone number 027-82453 Yes,it is .No,it isn't .
② Is that boy Eric?Yes ,he is .No,he isn't .
③ Is it her pen Yes ,it is .No,it isn't .