根据短文内容，判断正误。

                                                                                    (B)

      I used to be an active girl. But two years ago, an English speaking competition held in my school changed me a lot.

      I stood on the stage(讲台) for the first time. I was so nervous that my brain(大脑) suddenly became empty. Not long after I began my speech, the hall turned noisy. It seemed that they were laughing at me. I knew I failed.

      From then on, I became quiet and always stayed alone. I didn't want to express my ideas in public, even in class. Every time I wanted to say something, I thought people would laugh at me. My friends couldn't understand me, and they left me, one by one.

      One day, my science teacher asked us why trees in forests were much taller than those in the wild. “Ha, what a silly question!” I thought.

      “There's not enough space in the woods for trees to expand their branches. Of course they have to grow taller than others. The trees in the wild needn't do that since there's enough space. ” I said in a low voice.

      To my surprise, the teacher said, “Yes, you're right. It is a competition. ” My face turned red right now. I hadn't spoken for a long time, especially in public.

      Then the teacher explained how tree s in forests had to grow taller to receive more sunlight. If not, they would die. This also happened in our society.

      What's more, the tree that doesn't live in a crowd is just like a person who has no friends in life.

      I raised my head slowly and found the teacher was looking at me. His eyes were as warm as sunshine. I realized that I must stand up and face the truth.

阅读下面的古诗文，完成小题

    邓训字平叔，少有大志。显宗即位，初以为郎中。训乐施下士，士大夫多归之。

    章和二年，护羌校尉张纡诱诛烧当种羌迷吾①等，由是诸羌大怒，谋欲报怨，朝廷忧之。公卿举训代纡为校尉。诸羌激忿，遂相与解仇结婚，交质盟诅，众四万余人，期冰合渡河攻训。先是，小月氏胡②分居塞内，胜兵者二三千骑，缘勇健富强，每与羌战，常以少制多。虽首施两端，汉亦时收其用。

    时迷吾子迷唐，别与武威种羌合兵万骑，来至塞下，未敢攻训，先欲胁月氏胡。议者咸以羌胡相攻，县官之利。训曰：“不然。今张纡失信，众羌大动，经常屯兵，不下二万，转运之费，空竭府帑，凉州吏人，命县丝发。原诸胡所以难得意者，皆恩信不厚耳。今因其迫急，以德怀之，庶能有用。”遂令开城，悉驱群胡妻子内之。由是湟中诸胡皆言“汉家常欲斗我曹，今邓使君待我以恩信，开门内我妻子，乃得父母。”咸欢喜叩头曰：“唯使君所命。”训遂抚养其中少年勇者数百人，以为义从。

    永元四年冬，病卒官，时年五十三。胡人爱惜，旦夕临者日数千人。

（选自《后汉书•邓寇列传第六》，有删改）

【注】①烧当种羌迷吾：烧当种羌，与后文的“武威种羌”均为当时的羌族部落名称。迷吾，部族首领。②小月氏胡：西北少数民族。