The children were quite attracted by the tamer and his animals _______ were performing on the stage.

A. on / of              

B. in / for              

C. with / at           

D. for / at

A. are reported to be                                  

B. are reported to have been

C. are reporting to have been                     

D. are reporting to be

A. An

B. higher

C. which

D. including

A. of                     

B. in                     

C. for                             

D. with

A. of                     

B. on                    

C. for                             

D. in

A. took / were                                             

B. were taking / is

C. had taken / would have been                  

D. had taken / would be

A. should be done / being exploited            

B. we should do / exploiting

C. should do I be exploited                        

D. should have done / exploited