Use who, whom, that, which, and whose in the following sentences.
Difficulty: Easy
| 
 Words  | 
 Sentences  | 
| 
 Who  | 
 Who is knocking at the door?  | 
| 
 Which  | 
 This is the computer which I want to buy  | 
| 
 That  | 
 He tells a tale that sounds untrue.  | 
| 
 Whom  | 
 He is the man whom we all respect.  | 
| 
 Whose  | 
 I met that person whose son helped me.  |