cold conditions like the__19__from the Arctic.

　　 Modern zoos not only show animals for visitors, but also __20__and save rare animals. For this reason, fifty years from now, the grandchildren of today's can still be able to enjoy watching these animals.

　　1．A.that B．where

　　C．which D．there

　　2．A.houses B．rooms

　　C．cages D．offices

　　3．A.Therefore B．However

　　C．So D．Though

　　4．A.masters B．managers

　　C．keepers D．trainers

　　5．A.workers B．animals

　　C．bears D．tigers

　　6．A.excited B．angry

　　C．ill D．frightened

　　7．A.natural B．difficult

　　C．warm D．different

　　8．A.so that B．and

　　C．but D．or

　　9．A.forest B．nature

C．rivers D．the water