One­third of the country________ covered with trees and the majority of the citizens ________ black people.

A．is; are                       

B．is; is

C．a(chǎn)re; are                    

D．a(chǎn)re; is

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

One-third of the country ________ covered with trees and the majority of the citizens _______ black people.

One-third of the country____covered with trees and the majority of the citizens_______black people.

A is；are????? B is；is??? C.are；are??? D.are；is

One third of our school _________ covered by trees, while the majority of our students ________ girls.

A. is, is                                  B. are; are                            C. is; are                               D. are; is