she came back on__and left on__.A a wednesday:the saturdayB the wednesday:the saturdayC a wednesday:saturdaysD the wednesday:a saturday
问题描述：
she came back on__and left on__.
A a wednesday:the saturday
B the wednesday:the saturday
C a wednesday:saturdays
D the wednesday:a saturday
答
她在一个星期三回来，（然后）周六离开。
前面是强调不定，后面是固定搭配
答
she came back on a wednesday的意思是：她在某个星期三来了.left on the saturday的意思是：她在星期六的时候走了,加the是因为这个星期六是特指,特指这个星期星期六.