按要求改写句子。     
1．他用一根长头发绑住一只虱子。
改为“把”字句：                                                                           
改为“被”字句：                                                                            
2．蔡桓公派人把扁鹊请来。 
改为“被”字句：                                                                            
改为陈述句：                                                                                     
3．一只大雁被纪昌射中。 
改为“把”字句：                                                                             
改为陈述句：____