boys
                    - Look! Some boys are playing baseball, ________ are chasing, they all have fun.
 - Boys, don’t touch the machine, or you may hurt _________.
 - Boys, don’t lose____ in playing Angry Birds. It is bad for your eyes to play computer games for a long time
 - Boys, don’t lose____ in playing Angry Birds. It is bad for your eyes to play computer games for a long time.
 - _______ boys in my class can ski but _______ of them can do as well as Jim does.
 - Look! Those boys ________ football.
 - Look! The boys _______ football on the playground.
 - Where are the boys now? —Theyfootball on the playground
 - The boys ____ a football match tomorrow morning.
 - One of the boys ___________ up and tells a funny story for the class.