缩句。
1．人们是多么渴望在路边能出现一股清泉。  
                                                                                                                            
2．四季常青的松树上堆满了蓬松松沉甸甸的雪球儿。
                                                                                                                            
3．气象台发布了从西伯利亚来的寒流即将南下的消息。