阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该选项涂黑。

From the time each of my children started school, I packed their lunches. And in each lunch, I _ 21 _ a note. Often written on a napkin (餐巾), it might be a thank-you for a _ 22 _ moment, a reminder of something we were happily expecting, or a bit of _ 23 _ for the coming test or sporting event.

In early grade school they _ 24 _ their notes. But as children grow older they becomes self-conscious(有自我意识的), and _ 25 _ he reached high school, my older son, Marc, informed me he no longer _ 26 _ my daily notes. Telling him that he no longer needed to _ 27 _ them but I still needed to write them, I _ 28 _ until the day he graduated.

Six years after high school graduation, Marc called and asked if he could move _ 29 _ for a couple of months. He had spent those years well, graduating from college, _ 30 _ two internship (实习) in Washington, D.C., and _ 31 _ , becoming a technical assistant in Sacramento, _ 32 _ short vacation visits, however, he had lived away from home. With his younger sister leaving for college, I was _ 33 _ happy to have Marc back. Since I was _ 34 _ making lunch for his younger brother, I _ 35 _ one for Marc, too. Imagine my _ 36 _ when I got a call from my 24-yere-old son, _ 37 _ his lunch.

“Did I do something _ 38 _ ? Don’t you love me _ 39 _ , Mom?” were just a few of the questions he threw at me as I _ 40 _ asked him what was wrong.
“My note, Mom,” he answered. “Where’s my note?”