Several years ago I was in a San Diego restaurant with my mo

Several years ago I was in a San Diego restaurant with my mother.While I paid the bill,we both noticed an elderly woman waitting to be seated.As we left the restsurant,Mom asked,"Did you see that woman with the wonderful smile?"I most certainly did.Her smlie had lit up the room.It was that you don't often see in a stranger.And maybe Mom and I smiled back,I don't remember .Mom later said,"I wish I 'd told her what a wonderful smile she had ." But neither of us had,We 'd both received a gift without saying thank you.
I stopped at a fast-food restaurant for a quick bite.A woman in her 70s was sitting at her table quietly while her husband ordered.She glanced my way and smiled brightly .It was one of those smiles rhat tell others,"I love life!"
I was't going to let this opportunity pass——I was going to say something.As I walked toward this woman from 30feet away,her smile melted into a rather startled look,as if asking,"Did I do something wrong " I walked over to her and simply said ,"You have a wonderful smile!" Wow,did her face light up!And she responded with an enthusiasic "Thank you ." My words probably made her day,but they also made my day.We truly exchanged gifts that afternoon.
1.While the writer was in a San Diego restaurant ,he noticed a woman who was waitting for ______.
2.When the writer walked towards her,the woman looked_________.
3.The gifts they exchanged ——the woman's smile and _________——had made the day joyful for both of them.
不限定一空填几词的.