一道定语从句题

问题描述:

一道定语从句题
The house which he bought in 1999,____he sold two years later,is again on the market.A.and that B.which C.and which D.when
1,有如下规则“有两个定语从句,其中一个关系代词已用which,另外一个宜用that”,为什么这里用两个which
2.为什么which前要加and

1、有这个规则,但是这个规则的两个定语从局不是并列关系而是从属关系,比如说:the shirt which he bought for her in the shop that she love most is very nice.这道题里面两个定语从句是并列关系所以不用考虑这个规...