—When do you have biology?
—We have biology ______.
- A.in the morning of Wednesday
- B.on Wednesday morning
- C.in Wednesday morning
- D.at Wednesday morning
答案
正确答案:B
知识点:介词

具体某一天的上午用on。

在上午/下午/晚上要用in the morning/afternoon/evening,在具体某一天的上午/下午/晚上介词要用on。
