关于定语从句的题which ,where, that怎么区分Coke cans are sent to a factory,_____they are smashed flat and melted and the metal things are made into new coke cans.which ,where, that应该填哪个?为什么呢?

关于定语从句的题which ,where, that怎么区分Coke cans are sent to a factory,_____they are smashed flat and melted and the metal things are made into new coke cans.which ,where, that应该填哪个?为什么呢?
关于定语从句的题which ,where, that怎么区分
Coke cans are sent to a factory,_____they are smashed flat and melted and the metal things are made into new coke cans.
which ,where, that应该填哪个?
为什么呢?

关于定语从句的题which ,where, that怎么区分Coke cans are sent to a factory,_____they are smashed flat and melted and the metal things are made into new coke cans.which ,where, that应该填哪个?为什么呢?
选where,where在从句中充当in the factory.

where
看从句缺什么成分,where是表地点的代词,指可乐罐在那里被处理