单选题 — ______ ? Kate, you look pale.
—Oh, thank you. It doesn't matter.
  • A. What's on
  • B. What's up
  • C. Are you ill
  • D. Do you feel terrible


【正确答案】 B
【答案解析】[考点] what's up的用法
[解析] what's up等于what's wrong with you，C、D两项均为汉语习惯。