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已知关于x的一元二次方程x2+x-k=0的一个根为2,则它的另一根为     .
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       刘老师个子不高,微微发胖的脸上有一双时常眯起来的慈祥的眼睛,一头花白的头发更衬出他的忠厚。他有一条强壮的右腿,而左腿,膝以下被全部截去了,靠一根已经用得油亮的圆木拐杖支撑。这条腿什么时候、为什么截去的,我们不知道。只是有一次,他在讲到女娲补天造人的传说时,笑着对我们说:“……女娲氏用手捏泥人捏得累了,便用树枝沾起泥巴向地上甩。甩到地上的泥巴变成了人,只是有的人,由于女娲甩的力量太大,被摔丢了腿和胳膊。我就是那时候被她甩掉一条腿的。”教室里腾起一片笑声,但笑过之后,每个学生心里都泛起一股酸涩的感情,同时更增加了对刘老师的尊敬。
       他只靠着健壮的右腿和一支圆木棍,一天站上好几个小时,为我们讲课。逢到要写板书的时候,他用圆木棍撑地,右腿离地,身体急速地一转,便转向黑板。写完了粗壮的粉笔字,又以拐杖为圆心,再转向讲台。一个年过半百的老师,一天不知要这样跳跃旋转多少次。而他每转一次,就引起同学们一阵激动的心跳。
      然而,留给我印象最深的,还是刘老师每年春天放风筝的情景。
      北方的冬季漫长而枯燥。当春风吹绿了大地的时候,人们的身心一齐苏醒,一种舒展的快意便浮上心头。在晴朗而没有大风的日子,刘老师课余便在校园的操场上,放起他亲手制作的风筝。
      他的风筝各式各样:有最简单的“瓦片儿”,也有长达丈余的蜈蚣,最精妙的是黑色的燕子风筝。他的腿自然不便于奔跑,但他却绝不肯失去亲手把风筝送上蓝天的快乐。他总是自己手持线拐,让他的孩子或学生远远地擎着风筝。他喊声:“起!”便不断拉动手中的线绳,那纸糊的燕子便抖起翅膀,翩翩起舞,扶摇直上。他仰望白云,注视着那青黑的小燕在风中翱翔盘旋。他脸上漾出的那甜蜜的笑,使我觉得他不是一位老人,而是一个同我一样的少年。
你喜欢文中的老师吗?说说理由。

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      A couple of weeks ago, I made a trip to Toronto with my granddaughter who just turned three years old. The two of us were on our way to  1   her parents, and my wife—her  2    who had been gone for over a week. We were all anxious to  3    again and as I pulled out of Mamere and Papere's driveway in Chelmsford, Hailee and I were both  4    about the trip and couldn't wait to arrive at our   5.

When we completed the “SEVEN”-hour trip to Toronto later that day, the reunion was absolutely  6 and I can sincerely say I enjoyed every single minute of that   7     journey.

      Hailee is at that “I want to  8  it myself” stage of her life. And if you can just get over the “hurry-up syndrome” we acquire as  9, it is wonderful to witness. Who knew that putting a straw into the  10  in a juice box for the very first time could be such an earth-shattering (惊天动地的) event? Or being  11  enough to actually open the fridge door for the first time? Or putting on your own  12  on the right feet would be so  13?

      I'll never forget the look on her face the day she was able to  14 into my truck by herself. She finally  15 on my seat, holding onto the steering wheel (方向盘) and declared 16, “I did it!” And when she could actually put her own seat belt on—what a(n)  17!

    Have you ever watched a three-year-old 18 to sip a McDonald's milkshake through a straw? It is hard enough for an adult, too. And 19 every time the icy solution (溶液) touched her lips, you could see the 20 in her eyes. I learned that you can't hurry a child through a milkshake.