We pollute the water. We have no fresh water to use. 

A. should                  

B. must                     

C. had                              

D. ought 

A. having no disasters                        

B. likely to have disasters 

C. have very few disasters                 

D. have few disasters 

A. In spite            

B. Although           

C. However                      

D. Despite  

A. skins               

B. roots                        

C. stems                  

D. leaves 

A. and                   

B. but                       

C. So                                

D. or 

A. Certainly 

B. That's OK 

C. Thank you

D. I don't care