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This is ____ orange book and that is ____ apple.
A. a , an B. an , a C. an , an D. a , a
This is _____ orange shirt, and that is ____ green skirt.
This is ______ orange and that is ______ rose.
A．a; a
B．an; an
C．a; an
D．an; a
___
orange book and that is ____ apple.