句型转换While I was waiting for the bus,I met an old friend of mine
1.While I was waiting for the bus,I met an old friend of mine.
____________________________________,I met an old friend of mine.
2.If you walk straight down this road ,you will see the post office on your left.
__________________________________________,you will see the post office on your left.
3.I turned to her and asked her a question.
_______________________________,I asked her a question.
Rewrite the following sentences，using verb-ing phrases