People know they should save energy,______they still waste it.

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