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—What about ____ book?

　    —It’s too difficult ____ book for beginners.

　    A．the; the 　　　　   B．a; a 　　  C．a; the 　　　　　  D．the; a

—What about ____ book?

　    —It’s too difficult ____ book for beginners.

A．the; the 　　　　   B．a; a 　　          C．a; the 　　　　　  D．the; a