水池的四周栽了一些树，小贾和小范一前一后朝同一个方向走，他们都边走边数树的棵数，小贾数的第21棵在小范那里是第6棵；小贾数的第8棵在小范那里是第95棵。则水池四周栽了多少棵树
A．142
B．137
C．102
D．100
参考答案：C
解析： 由于小贾数的第21棵在小范那是第6棵，所以小范应该在前面，并与小贾相距15棵数的距离。又因小贾数的第8棵数在小范那是第95棵，所以第95棵前面还有15-8=7棵树，故水池四周应有95+7=102棵树。
| It was in my high school science class. I was doing a task in front of the classroom with my favorite shirt on. A__1__ came, "Nice shirt," I smiled from ear to ear. Then another voice said, "That shirt belonged to my dad. Greg's mother works for my family. We were going to__2__ that shirt away, but gave it to her__3__." I was speechless. I wanted to hide. I__4__ the shirt in the back of the closet and told my mom what had happened. She then dialed her __5__, "I will no longer work for your family," she told him. That night, mom told my dad that she couldn't clean anymore; she knew her life's__6__ was something greater. The next morning she__7__ with the personal manager at the Board of Education. He told her that without a proper education she could not teach. So mom decided to__8__ a university. After the first year in college, she went back to the personal manager. He said, "You are__9__, aren't you? I think I have a__10__ for you as a teacher's assistant. This opportunity deals with children who are mentally challenged with little or no chance of__11__." Mom accepted the opportunity very __12__. For almost five years, as a teacher's assistant, she saw teacher after teacher give up on the children and quit, feeling__13__. Then one day, the personal manager and the principal__14__ in her classroom. The principal said, "We have watched how you__15__ the children and how they communicate with you and admire your hardworking__16__ over the last five years. We are all in agreement that you__17__ be the teacher of this class." My mom spent more than 20 years there. __18__ her career, she was voted Teacher of the Year. All of this came about because of the__19__ comment made in the classroom that day. Mom showed me how to handle__20__ situations and never give up.
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