Even though it was only October, my students were already whispering about Christmas plans. With each passing day everyone became more (1)________waiting for the final school bell. Upon its (2)________everyone would run for their coats and go home, everyone except David.
David was a small boy in ragged clothes. I had often (3)________what kind of home life David had, and what kind of mother could send her son to school dressed so (4)________or the cold winter months, without a coat, boots, or gloves. But something made David (5)________I can still remember he was always (6)________a smile and willing to help. He always (7)________after school to straighten chairs and mop the floor. We never talked much. He (8)________just smile and ask what else he could do, then thank me for letting him stay and slowly (9)________home.
Weeks passed and the (10)________over the coming Christmas grew into restlessness until the last day of (11)________before the holiday break. I smiled in (12)________as the last of them hurried out the door. Turning around I saw David (13)________standing by my desk.
“I have something for you” he said (14)________from behind his back a small box. (15)________it 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 my (16)________saw nothing I looked at David's smiling face and back into the box and said.” The box is nice, David, but it's (17)________.
“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 eves (18)________I looked at the proud dirty face that I had rarely given (19)________to. After that Christmas, David and I became good friends and I never forgot the meaning (20)________the little empty box set on my desk.
anxious渴望的，急切的。courageous勇敢的。serious严肃的。 cautious谨慎的。学生们应该是非常急切地期待下课铃声响起。故选A。
本题中的its指的是school bell，只能与ring搭配。故选B。
此处是说“我总是想，大卫过着怎样的家庭生活……”，故用 wondered。
modestly谦逊地；naturally自然地；inaccurately不准确地； inappropriately不适当地。由下文中的“without a coat, boots, or gloves”可知David穿得不合适。
上文中提到David穿得不好，下文中说到作者能记得David脸上一 直挂着微笑，总是乐于助人，说明他与众不同，故选special特殊的， 特别的。
固定搭配，wear a smile脸上挂着笑容。
此处是说David在放学后待在学校摆齐凳子、拖地。
本题考查情态动词的辨析，would总是，老是。
此处是说David打扫完教室后回家。head for朝……进发，前进。
此处是指学生们期待已久的圣诞到来的兴奋之情，故选 excitement。
后半句提到“before the holiday break”，故此处应该是school day。
此处是说“在最后一名学生出了教室之后，我欣慰地笑了”。
此处是说“David静静地站在讲桌旁”。
此处是说“David从身后把那个盒子拉出来”。
hand sth to sb把……交给某人。
送人的礼物一般盒子里面都会有东西，但老师打开后盒子是空的，所以老师感到惊奇。
由上文所说的“saw nothing”可知盒子是空的。
本题考查连词的用法，此处as引导时间状语从句，“当我看着那张脏脏的但却充满骄傲的脸时”。
由前文提到的“we never talked much”可知，作者并没有对David 注意太多。
此处是说“空盒子背后的意义”，故用behind。