Choose the right answers to complete the sentences. 1) at 11 a.m. on Saturday? 
 2) about these problems?
 3) Why to the theatre?
 a. 1) Did Peter get up; 2) Did you think; 3) did Jane go
 b. 1) Did Peter gets up; 2) Did you think; 3) did Jane goes
 c. 1) Did Peter got up; 2) Did you thought; 3) did Jane went
                                                                                                
                            
                            
                            
                                
                            
                            
                                
                            
                            
                            
                         
                    
A is right
Объяснение:
because The auxiliary verb did after the main verb