Last Wednesday，our teacher Mr. White held up an apple. First he stood on the platform（讲台） and said，"Please smell（闻） it 1 the air，and . . . "
One of my classmates Alice put up her hand and said 2 ，"I can smell it. It is the smell of an apple. "She is always the top student in my class.
My teacher said 3 and he just walked down from the platform，went by each of us and said，"Smell again to see if the smell of the 4 is still in the air. "
Half of my classmates put up their hands to show that they could smell 5 . My teacher went back to the 6 of the classroom and asked again who else could smell the apple. The rest 7 their hands except（除了） Bill. The teacher came to Bill and asked，"You really can't smell the apple？"
Bill answered，"No，I can't smell it. I don't think it's a 8 apple. "
My teacher smiled at Bill and said to us，"He's right!It's not possible to 9 the apple smell from this apple. "
Some of us might think that the apple didn't have the apple smell， 10 they didn't dare to speak up. We just followed Alice and went wrong. Mr. White gave us an important lesson on that day.
