第二节 完型填空
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。
The lecture on smoking was over at last. As we boys were rushing towards the playground, Jim slipped by the table. The watch, which Mrs. smith had【B1】on the table as she started her lecture, disappeared.
We were【B2】to go back for class again when the headmaster called us【B3】and said, "I've got a little【B4】for you boys. Mrs. Smith has just lost her watch on the playground. This kind of thing has happened【B5】, she says it just 【B6】off her wrist (手腕). So, look around for it, will you？【B7】if you're clever enough to find it. Let's【B8】it clear the boys who does【B9】will get a useful reward (奖赏)."
At once we started looking for the watch. Everybody wished to be the【B10】one. Suddenly, Jim stopped and bent down as if to【B11】something. And【B12】he was in front of Mrs. Smith, all smiles,【B13】the watch to her.
Mrs. Smith, however, didn't seem at all【B14】. In fact, she looked angry. She took the watch without【B15】a "Thank you".
Jim got【B16】, a large piece of paper, from the headmaster, who【B17】him to write a composition【B18】the dangers of smoking. What could【B19】Jim write about？ He hadn't listened to the lecture and had nothing to say on the【B20】.
【B1】

A. seen
B. dropped
C. found
D. laid