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[单选题]
The ____ River forms part of the boundary between Canada and the USA, serving as an international river.
A.Colorado
B.Ohio
C.Missouri
D.St.Lawrence
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A.Colorado
B.Ohio
C.Missouri
D.St.Lawrence
A.boundary
B.string
C.spot
D.zone
The Yellow River is the second ______river in China.
A.long
B.longer
C.longest
D.most long
A.错误
B.正确
The Great Pyramid______the west bank of the Nile River, not far from Cairo.
A.is located on
B.is situated in
C.is located at
D.is situated of
A.正确
B.错误
A.invitation
B.challenge
C.request
D.demand