求教两道定语从句的选择

题目

求教两道定语从句的选择
1.------Is that the small town you often refer to?
------Right,just the one______you know I used to work for years.
A.that B.which C.where D.what
2.Is this museum________some German friends visited the day before yesterday?
A.which B.that C.where D.the one
我选择的是A和B但是答案都是D,为什么呢?

答案

1.C where（引导壮语从句） you know（插入语） I used to work for years（应为句子不缺少成分所以用不到what ）2.D some German friends（主语） visited（谓语 不及物） the day before yesterday（时间壮语）也...