One third of the country________covered with trees and the majority of the citizens________black people. 
#85549
A
is; are
B
is; is
C
are; are
D
are; is
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As we all know, the number of Tibetan antelopes(藏羚羊) ________ becoming ___________.
#43648
A
is; less and less
B
are; less and less
C
is; smaller and smaller
D
are; smaller and smaller
More than one child _____to the cave to see the strange animal.
#85655
A
have gone
B
are gone
C
has been
D
is been