重点句型运用 — 英语选择题

Tom每周三下午有一节科学课。他想把这句话"I have a science class on Wednesdays."改写成问句，询问别人周三上什么课。下列改写正确的一项是： A. What do you have on Wednesdays? B. What do you have on Wednesday? C. What day is it today? D. Do you have a science class on Wednesdays?