找英语高手.

请解释下:(非)限制性定语从句,谓语,状语,关系词 等一些英语语法上常出现的词.

还有什么定语从句部分的内容不是很懂,希望能够帮忙.

For example:

1.All the neighbors admire this family,______the parents are treating their child like a friend.

A.why    B.where   C.which   D.that

2.We went through a period_____communications were very difficult in the rural areas.

A.which    B.whose   C.in which   D.with which

3.He has lost the key to the drawer_____the papers are kept.

A.where   B.on which   C.under which  D.which

个人选了CDB,请指点.谢了.

B，非限制性定语从句首先that排除，如果用which不可以在分句中做状语，而一般做主语、宾语或表语。

C，这里考的是“介词+关系代词”此处=where

A,此处的where=in which,还原为the papers are kept in the drawer.