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1--What's this?

          --It's__ backpack.

          --Where's__ backpack?

--It's on the bed.

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

 

--What's this?
--It's__ backpack.
--Where's__ backpack?
--It's on the bed.

A．a; a

B．the; /

C．the; the

D．a; the

--What's this?

     --It's__ backpack.

     --Where's__ backpack?

--It's on the bed.

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