A. deadly                           

B. fatal                               

C. harmful                         

D. nonpoisonous

A. maintain/ preserve         

B. maintain / create            

C. create / protect               

D. keep / increase

A. apps                              

B. media                            

C. messages                       

D. sites

A. in  

B. with                               

C. at   

D. on

A. to arrive                        

B. for 

C. spends                           

D. slowly

A. run out of                      

B. dispose of                     

C. reduced                         

D. get rid

A. harmony                        

B. unity                              

C. separation                     

D. friendship