You write him a letter to say you are sorry for it.

You write him a letter to say you are sorry for it.
---I don‟t like writing letters. I‟ll apologize _____ the phone
A. could in
B. should in
C.can over
D.must through

要理由

无论哪组都不能用在你划的一条空格里,因为语法上说不通。估计这两个词应分别用在不同的地方。
合理的是选 C. 把 can 放入第一句,over 放到格子里:
You (can) write him a letter to say you are sorry for it.
--I don't like writing letters. I'll apologize (over) the phone.
用 over 含有 “talk over the phone” -- 在电话里谈话 的意思。
in the phone 是在电话机里的意思,不适合。
through the phone 也可以,但没有 over 好。
另外 you must write ... 这个 "must" 语气太强烈,有“必须”的意思,实际上道歉有多种方式,并非必须用写信的方式。电话talk, 互动 方式更好。第2句的信用的是复数,说明这件事情挺复杂,要几封信才说得清,显然 电话talk, 互动 方式更好。
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