из демонстрационного врианта егэ по английскому. 

B8 I remember my last year at shool very well. There were three boys (name) William in my class .
B9 Miss Fisher, one of the teachers, called them all William, and we (not know) which one she was talking to.

B10. One day, during a lesson on efficiency, she thundered, " William, put that gum you (chew) in the wastepaper bin at once!" 

B8 I remember my last year at shool very well. There were three boys named William in my class .B9 Miss Fisher, one of the teachers, called them all William, and we did not know which one she was talking to.B10. One day, during a lesson on efficiency, she thundered, "William, put that gum you are chewing in the wastepaper bin at once!"