下列各句均有一处错误，请指出并改正

1.how--what what在这里做do with 的宾语。

2.writing--to write ask sb.to do sth.让某人做某事。（固定句型）

3.and--with with “与、和”
这句话的意思是：这个男人和孩子们成为了朋友。

以上仅为个人观点 如有不对请见谅！

What did the teacher do with the boy?
what...do with/ how ...deal with 如何处置（固定搭配）

Lucy asked me to write a piece of music for me.
ask sb. to do sth （ 不定式搭配）

The man became good friends with these children.
跟某人交朋友，一般用复数

1 how-what 这样从意义上才顺
2 writing-to write ASK SB TO DO的用法
3 The man and these children became good friend. 这个根本就是写颠倒了。。。不解释。。。

with->by
do by
To behave with respect to; deal with:
尊重：在某方面表现；对待：
The children have done well by their aged parents.
孩子尊重年老的父母
writing->to write
ask sb to do sth
and->with