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问题: 高一英语

I'am sorry that I cannot accept your _____ to attend your birthday party,Linda,because I was ____ to answer all the customer's letters tonight by my boss.
A requirement,required Bdemand,requested
Crequest,asked Drequest,required
为什么答案是D,而不是C?ask不是要求的意思吗?

解答:

require是需要,命令的意思,较ask正式,语气更强烈
required本身也有“必需的”的意思。
ask一般表示 某人(有把握的)请求,要求什么,不用于被动;而且,这里表达的是 必须回复所有客户的信件,不容商量。
看下面例子:
All passengers are required to show their tickets.
所有乘客都必须出示车票。

必须显然比要求更为严厉和正规。
仔细体会如下一段话及例子:
ask含有期望“给以回答”或“作出反应”的意思。当你觉得所要求的东西会得到时,或者不可能被拒绝时,用ask。看下面三个例子,都没有“必须”之意:
The following day, the patient asked for a bedside telephone.
第二天,那位病人要求安装一个床头电话。
Last week at a dinner-party, the hostess asked me to sit next to Mrs Rumbold.
上星期在一次宴会上,女主人要我坐在兰姆伯尔德夫人的旁边。
Though she hesitated for a moment, she finally went in and asked to see a dress that was in the windows.
虽然他迟疑了一会儿,但是他终于走了进去,并且要求看一看摆在橱窗里的一件衣裙。