关于定语从句引导词，in which 与where的问题.多谢

Snazzy

i have got some idea, but not complete yet, let me think
do we have  more examples???

Snazzy

以下是引用dreadpower在2003-12-29 10:38:00的发言：

    大家在等你的IDEA哦，我急于知道

sorry, buddy, i just came back.
Thanks, daisy, for yoru example.
1, sometimes, in which = where/when eg.
  This is the hause in which I live.=This is the hause where I live.
  I would assert that the above example is the same case. If E were "in which 49% of hausehold incomes are", it would be right.

2, in some cases, "in which" is prefered, rather than "where" or " when", mostly because of the idioms. The first sentence is  a good example.
It is in an age that great ice sheets had existed. It would be wrong if there were not 'in'.

I have run out of wisdom.:-)

Snazzy

here is another example:
122.    As a result of the continuing decline in the birth rate, less people will enter the labor force in the 1980’s than did in the 1960’s and 1970’s, a twenty year period during which people born after the war swelled the ranks of workers.
(A) less people will enter the labor force in the 1980’s than
(B) less people will be entering the labor force in the 1980’s as
(C) fewer people will enter the labor force in the 1980’s as
(D) fewer people will be entering the labor force in the 1980’s as
(E) fewer people will enter the labor force in the 1980’s than