英语复合句改写问题1. The old man was walking down the street. I met him.(合并为一个复合句)2.What was he doing? The plane took off.（同上）
问题描述：
英语复合句改写问题
1. The old man was walking down the street. I met him.(合并为一个复合句)
2.What was he doing? The plane took off.（同上）
答
1.The old man was walking down the street when I met him.
2.What was he doing when the plane took off?