Question

---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

Answer 1

C
用现在完成进行时态表示动作从过去某一时刻开始持续到现在，现在说话时动作仍然在进行。