---Alice what’s wrong with you? You look so worn out. ---Nothing serious. I my new house

问题补充：

---Alice, what’s wrong with you? You look so worn out.

---Nothing serious. I my new house all day and I’m afraid I won’t finish until tomorrow afternoon.

A. have whitewashed

B. am whitewashing

C. have been whitewashing

D. shall be whitewashing

答案：

A. have whitewashed

B. am whitewashing

(答案→)C. have been whitewashing

D. shall be whitewashing

解析：考查时态：句意：---爱丽丝，你怎么了？你看起来很疲劳啊。--没什么严重的，我一天一直在粉刷房子，恐怕明天下午才能完成。用现在完成进行时，表示动作从过去一直延续到现在，可能还要继续。选C。