—I would like to pick up your sister for you. But I don’t know her. ?—A middle-aged woman

问题补充：

—I would like to pick up your sister for you. But I don’t know her. ?

—A middle-aged woman with a round face, wearing a red blouse.

A. How about your sister?

B. What do you think of your sister?

C. What is your sister like?

D. What does your sister do?

答案：

A. How about your sister?

B. What do you think of your sister?

(答案→)C. What is your sister like?

D. What does your sister do?

解析：考查交际用语。根据A middle-aged woman with a round face, wearing a red blouse，可知是询问长的什么样。所以选C。