下列命题中，真命题有（　　）

（1）直线外一点与直线上各点连接的所有线段中，垂线段最短；

（2）两条直线被第三条直线所截，内错角相等；

（3）经过两点有一条直线，并且只有一条直线；

（4）如果一条直线和两条直线中的一条垂直，那么这条直线也和另一条垂直．

参照例句，以“信念”开头仿写三句话。

       例句：快乐是陶渊明“采菊东篱下，悠然见南山”的闲适，是李白“举杯邀明月，对影成三人”的陶醉，是杜甫“好雨知时节，当春乃发生”的欣喜。

信念____，____，____。

根据课文内容填空

     Yesterday my sister and I went____(buy)something for her birthday．She didn't really know what____(get)but she seemed____(like)the idea of a pet，so we went to the nearest pet shop．She started ____(look)around at an the animals．The man in the shop advised her ____(choose)the rabbits，but when she saw some puppies(小狗) ____(play)in the box，she said she would like____(have)one of them．I didn't know if we had enough money____(buy)one and I hoped my mother would want us____(have)a dog in the house，but my sister promised____(look after)it well and we had enough money，so we bought a little brown dog.