on+星期和at+钟点的介词搭配 — 英语填空题
题目
根据短文内容，用 on 或 at 填空（每空一词）。Sandy has a busy week. She plays volleyball ___ Wednesday afternoon ___ 4:30 p.m. But she doesn't go to the library ___ Saturday ___ half past nine in the morning, because it opens ___ Monday only. So she goes there ___ 10:00 a.m. that day instead.