address,activity作为定语先行词时需要一个引导词“where“.
例如：1、Those successful deaf dancers think that dancing is an activity where sight matters more than hearing.那些失聪的成功舞蹈演员们认为,舞蹈是一种让人看胜过让人听的活动.
2、I will give you my friend’s home address,where I can be reached most evenings.这里的where=at this address.
这两句中的address和activity只是作为先行词,而不是状语.后面的引导词where才表示地点状语.