以下短文中共包含5个未完成的句子，针对每个句子中空缺部分有5个选项，请从A、B、C、D、E五个选项中选出正确选项。 
  
Last night, a fire broke out in Ann"s house in Manchester. 
Ann"s parents were out of town for the weekend when something wrong in the room caused the fire to   21   in the middle of the night. The girl was waken up by the family dog, Danny, who was barking loudly in the back garden. Ann smelled something  22 _ . She got up and at once ran through the smoke-filled house to wake her old brother, Frank. 
When Frank would not wake up, Ann got some help from the dog. Frank"s unconscious body was far too  23   for the little girl to move alone , but the clever girl brought the dog inside and    24  the dog"s leash（牵狗的皮带）to Frank"s left ankle. She then held her brother"s right ankle, and together the girl and the dog  25 Frank to safety. 
The 10-year-old girl, Ann, saved her big brother from death. 
  
21.  
A：heavy 
B：burning 
C：start 
D：pulled 
E：tied 
  
22.  
A：heavy 
B：burning 
C：start 
D：pulled 
E：tied 
  
23.  
A：heavy 
B：burning 
C：start 
D：pulled 
E：tied 
  
24.  
A：heavy 
B：burning 
C：start 
D：pulled 
E：tied 
  
  
25.  
A：heavy 
B：burning 
C：start 
D：pulled 
E：tied