He wrote to say that he had read several new books and profited greatly from them.
I’m writing to reply to your questions.
I’m writing to enquire about language courses.
Dear Sunday Globe, I am writing to tell you about your article Smartphones Make Life Easier in last Sunday’s newspaper ．
中考真题- 2017 安徽
One of their neighbor had written to complain about the sound of the piano.
高考真题- 2015 北京
2. write to+人或单位、机构
I wrote to him but I never had an answer back
He would start writing to his family and would screw the letter up in frustration
Lack of time prevented me from writing to my parents.
I’m sorry I haven’t written to you for so long.
Many people have written to me on this subject
They haven’t written to each other lately.
Their daughter hadn’t written to them for a long time, and they were rather worried.