I have a letter____ but i'm too busy.------------Why not have your son_____it for you?A.to post;postB.posted;postC.to post;to postD.post;post 请说明一下为什么

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I have a letter____ but i'm too busy.------------Why not have your son_____it for you?A.to post;postB.posted;postC.to post;to postD.post;post 请说明一下为什么
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I have a letter____ but i'm too busy.------------Why not have your son_____it for you?A.to post;postB.posted;postC.to post;to postD.post;post 请说明一下为什么
I have a letter____ but i'm too busy.------------Why not have your son_____it for you?
A.to post;post
B.posted;post
C.to post;to post
D.post;post 请说明一下为什么

I have a letter____ but i'm too busy.------------Why not have your son_____it for you?A.to post;postB.posted;postC.to post;to postD.post;post 请说明一下为什么
选A.to post;post
第一空是不定式作定语修饰letter.当不定式修饰的名词刚好是不定式动作的对象时,不定式必须用主动形式,故第一空不能选posted.
第二空的考点为:have sb.do sth .意为" 让某人做某事" ,这是固定搭配,作宾补的不定式在动词have.let .make 等后不能带to .故第二空要选post.

A我要去做什么事，to加动词
后面是have sb. do sth.

A
have sth to do 有什么要做
have sb. do 让某人做某事

a

第一个to post不用说明
第二个have sb do sth.

I have a letter____ but i'm too busy.------------Why not have your son_____it for you?A.to post;postB.posted;postC.to post;to postD.post;post 请说明一下为什么 l have some letter____ the boss said to the secretary.A.to type B to be type C typing D.typed What letter is a question?It's the letter____!什么信件是问题?它是信件____! The letter____ in French is to Li Lei.A.writes B.is written C.written D.writing I have a desk.I have a I have a dog. I have a beautiful i have a I have got a I have a great i have a chance I have a headache I have a bag. I have a I have a question! i have a h____family I gonna have a I have a bad