______ consists of some of the world's oldest rocks dating back nearly four billion years.
A.the Belfast Agreement
B.Mount Kosciusko
C.1877
D.African Americans
E.burgesses
F.Maori
G.The Canadian Shield
H.Domesday Book
I.The Bill of Rights
J.Hispanics
K.1907
L.Joan of Arc
【正确答案】：G
