Rewrite the following sentences without changing the meaning, using the words given

Rewrite the following sentences without changing the meaning , using the words given
1 This book is cheaper than my book.
=>My book is                                                            
2 Who owns this house ?
=>Who does                                                             ?
3 They like to walk in the rain.
=>They enjoy                                                                        
4 Nam began learning english five years ago
=>Nam has