There is no obvious evidence_______there is life on any other planet in the solar system.

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

There is no obvious evidence_______there is life on any other planet in the solar system.

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

There is no obvious evidence         there is life on any other planet in the solar system.

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

There is no obvious evidence_______there is life on any other planet in the solar system.