有没有关于宾语从句、直接引语和间接引语之间互相转换、状语从句的练习及答案

1.Mr Brown said,“ Don’t make such a mistake again,Mary.”（改为间接引语）
Mr Brown told Mary____ ____ _____such a mistake again.not to make.
2.He didn't know how they should save the file.(改为复合句）
He didn't know ___ ___save the file.
how to
3.Mr Brown said,“ I can speak English.”
Mr Brown said that he could speak English.
4.Mr Brown asked Jim,“How old are you?”
Mr Brown asked Jim how old he was.

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