1.答案：D.
2.翻译：我将会把我朋友的家庭住址给你,通过它(你)可以在大多数晚上联系到我.
3.
1）此题考查非限制性定语从句,关系副词where = through which = through my friend's home address.
2) 完整的定语从句为：
where I can be reached most evenings
=through which I can be reached most evenings
=through my friend's home address I can be reached most evenings
=I can be reached most evenings through my friend's home address
等同于：You can reach me through my friend's home address
3) 关系副词where不但可以指本意的地点状语,亦有引申的含义.
如：You will find yourself in a situation where(=in which=in a situation) you can't control your own behaviour.
你会发现自己处身于一种无法控制自己行为的情形.