阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
We first met Tom and Gee in the
early days of our marriage. Someone had been 1 our garbage cans to the garage each garbage
day, and Jim and I had wondered 2.
Then one day we 3 him: an elderly man who lived across the
street.
I baked cookies and left them
on a chair outside the garage 4 a thank-you note. When we got home from work
that day, a typed letter had replaced the 5.
The letter was from Tom and explained how he had come to 6 the neighborhood on garbage day, returning
cans for people he 7 knew. Back when he'd been fighting a war I
wasn't alive to see, his young wife, Gee, had found herself living alone.
Neighbors had taken the time to 8 her garbage cans so 9 didn't have to, and he 10 forgot. Now he paid it forward by doing the
same for all of us.
A few years after we'd moved
in, Tom died. We photocopied that letter and 11 it to one of our own for Gee. We told her how 12 Tom had been to us, how sad we felt sorry for
her, how thankful we were to have 13 him. She wrote back and told us she still
talked to Tom every day.
These days, we're planning a 14.
The house that seemed so huge six years ago is filled with furniture and books
and toys and, of course, people. We know it's time to go, and 15 we can't seem to stick the For Sale sign up
on the lawn. Gaining a third bedroom sometimes seems like an awful trade for
all we stand to 16.
It's not just Gee. It's the man
who lets our kids pick peaches off the tree in his front yard. It's the ladies
who 17 Jim when their pool filter (过滤器)
breaks and leave overflowing baskets for our kids on Easter. It's the police
officer living directly across from us, who smiles and waves and makes me feel
a little 18 when Jim is away.
The moving boxes are still
neatly packed in our basement, but Jim and I agree to 19 until January. Maybe before leaving I'll talk
to Tom, just as Gee still does. Thank you, I'll say, for teaching us what it
means to be a 20.
