—Hi，Tracy，you look tired.

—I________the living room for three hours.

A．paint                                             B．had painted

C．was painting                                    D．have been painting

---Hi，Tracy，you look tired．

---I am tired．I ________ the living room all day．（NMET' 98，24）

1. A.
   painted
2. B.
   had painted
3. C.
   have been painting
4. D.
   have painted

--Hi，Tracy，you look tired．

--I am tired．I ________ the living room all day．

[　　]

--Hi，Tracy，you look tired．

--I am tired．I ________ the living room all day．

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