问题补充:
Lucy usually watches TV Saturday evening.
A. on
B. in
C. at
D. for
答案:
(答案→)A. on
B. in
C. at
D. for
解析:on用在具体的某一天或具体某一天的上午、下午或晚上,如:on Monday在周一,on Thursday evening在周四晚上;in用在四季和月份的名词前,如:in January在一月份,in spring在春天;at用在时间点的前面,如:at 5:25在5:25。故选A。