He’s bought a cottage in the country for          he retires, with the money he’s saved over half of his life.

       A．when                  B．where                 C．what                   D．which

He's bought a cottage in the country for ________ he retires, with the money he's saved over half of his life.

[　　]

He's bought a cottage in the country for _____________ he retires, with the money he's saved over half of his life.

[　　]

He's bought a cottage in the country for ________ he retires， with the money he's saved over half of his life．

1. A.
   when
2. B.
   where
3. C.
   what
4. D.
   which

He's bought a cottage in the country for ________ he retires， with the money he's saved over half of his life．

[　　]

He's bought a cottage in the country for ________ he retires， with the money he's saved over half of his life．

[　　]