The poor lady had to go out for food a cold morning.A.in\x05\x05\x05\x05B.at\x05\x05\x05\x05\x05C.on\x05\x05\x05D.during

The poor lady had to go out for food a cold morning.A.in\x05\x05\x05\x05B.at\x05\x05\x05\x05\x05C.on\x05\x05\x05D.during
The poor lady had to go out for food a cold morning.
A.in\x05\x05\x05\x05B.at\x05\x05\x05\x05\x05C.on\x05\x05\x05D.during

The poor lady had to go out for food a cold morning.A.in\x05\x05\x05\x05B.at\x05\x05\x05\x05\x05C.on\x05\x05\x05D.during
on
---------------
引导时间状语的介词in/on/at/during/till与until
1、用in的时间短语有：
① 表示一天中的某段时间：in the morning；in the afternoon；in the evening
② 表示周、月份、年份：in a week；in January；in Feb；in 1992
③ 表示季节：in summer；in spring；in autumn；in winter
in+表示时间长度的短语可以表示“在某段时间之内”,这时可以与现在时、过去时或将来时连用,一般与完成某动作有关；还可译为“……时间之后”,一般与将来时连用.根据时态判别in 表示的含义
in twenty minutes' time 20分钟之后
We will finish class in half an hour.
2、用on的时间短语有：
① 表示星期：on Monday；on Friday
② 表示日期：on June 1st；on 23rd March（在书写日期时没有冠词,但在口语中则分别读为：on June the first；on the 23rd of March）
③ 表示星期+日期：on Monday,June 1st
④ 表示具体时间：on Wednesday evening；on fine afternoon；on that day
3、用at的时间短语有：
① 表示确切的时间：at five to twelve；at ten o'clock
② 表示用餐时间：at lunch/dinner time；at teatime
③ 表示其他时刻：at night；at noon；at midnight；at that time
4、during在……期间,后必须跟一个名词,可以指整个一段时间,有时可以用in替代
He has phoned four times during the last half hour.
I met him sometime during the week.（不能用in代替） 我是在这一周的某天遇到他的.
during the holiday 强调假期的从头到尾
He enjoyed himself during his holiday.
in the holiday 强调这段时间其中某一点时间,并不表示自始至终
I was caught in an accident in the holiday.
5、from…till… 指一段明确的时间：
The tourist season runs from June till October.
6、until prep.&coin.直到……时候,直到什么时候为止,直到什么时候才
until主句和从句两个都用一般过去时对(最习惯的一种用法),主句和从句任何一个用过去完成是也对
I can't enter for the sports meeting until tomorrow.
I had not understood the problem until he explained it.
We hadn't disturbed him until he finished work.
We didn't disturb him until he had finished work.
We didn't disturb him until he finished work.(更习惯于这种用法)
7、from…to…
Everyday we have English class from 8:30 to 11:30

A
在一个寒冷的早晨

at

on a cold morning