27．In hot weather, an old tyre can break again easily _____it’s mended．

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

In hot weather, an old tyre can break again easily _____it’s mended．

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

In hot weather, an old tyre can break again easily _____it’s mended．

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

In hot weather, an old tyre can break again easily      it’s mended.

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