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Great Wall is longest wall in the world.
A. The , the B. A .a . C. The ,a
Great Wall is longest wall in the world.A. The , the B. A .a . C. The ,a
________ Great Wall is ________ longest wall in the world．
A．The, the
B．A．a．
C．The, a
_____ Great Wall is _____ longest wall in the world.
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A. The, the B. A, a C. A, the D. The, a