Print the page in color so that you have enough for each student in your class (if you have 24 students, print the page 12 times). Cut each page in half. Put students in pairs giving each person in the pair half of the sheet. One student conjugates the verbs indicated using the pronouns his/her partner tells him/her. The partner has the answers so can correct any mistakes. Then students switch roles.
When students get to the bottom of the sheet, they switch papers and do the drill again. In my classroom, students must repeat the drill until they are instructed to stop.