________ from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world．

1. A.
   Having been separated
2. B.
   Separated
3. C.
   It has been separated
4. D.
   Having separated

       from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world.

       A．Having been separated                          B．Separated

       C．It has been separated                            D．Having separated

        from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world.

A．Having been separated                                 B．Separated

C．It has been separated                                   D．Having separated

______ from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world.
      A. Having been separated         B. Separated

C. It has been separated          D. Having separated

______ from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world.
A. Having been separated    　　　 B. Separated
C. It has been separated     　　　　D. Having separated