1. (2022高二上·德阳开学考) 阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。

Even though it was only October, my students were already whispering about Christmas plans. With each passing day everyone became more1waiting for the final school bell. Upon its2everyone would run for their coats and go home, everyone except David.

David was a small boy in ragged clothes. I had often3what kind of home life David had, and what kind of mother could send her son to school dressed so4or the cold winter months, without a coat, boots, or gloves. But something made David5.I can still remember he was always6a smile and willing to help. He always7after school to straighten chairs and mop the floor. We never talked much. He8just smile and ask what else he could do, then thank me for letting him stay and slowly9home.

Weeks passed and the10over the coming Christmas grew into restlessness until the last day of11before the holiday break. I smiled in12as the last of them hurried out the door. Turning around I saw David13standing by my desk.

"I have something for you" he said and14from behind his back a small box.15it to me, he said anxiously. "Open it." I took the box from him, thanked him and slowly unwrapped it. I lift the lid and to my16I saw nothing. I looked at David's smiling face add back into the box and said, "The box is nice, David, but it's17"

"Oh no it isn't" said David "It's full of love, my mum told me before she died that love was something you couldn't see or touch unless you know it's there"

Tears filled my eyes18I looked at the proud dirty face that I had rarely given19to. After that Christmas, David and I became good friends and I never forgot the meaning20the little empty box set on my desk.