【1】A modern city has been set up in____was a wasteland ten years ago.A.what B.which请问为什么B不对?【2】Is this the reason ___at the meeting for his carelessness in his work?A.he explainedD.why he explained请问为什么D不对?

【1】A modern city has been set up in____was a wasteland ten years ago.A.what B.which请问为什么B不对?【2】Is this the reason ___at the meeting for his carelessness in his work?A.he explainedD.why he explained请问为什么D不对?
【1】A modern city has been set up in____was a wasteland ten years ago.
A.what
B.which
请问为什么B不对?
【2】Is this the reason ___at the meeting for his carelessness in his work?
A.he explained
D.why he explained
请问为什么D不对?

【1】A modern city has been set up in____was a wasteland ten years ago.A.what B.which请问为什么B不对?【2】Is this the reason ___at the meeting for his carelessness in his work?A.he explainedD.why he explained请问为什么D不对?
1.
因为后面的从句少的是主语而不是状语
所以不能用in which（相当于where）
只能直接用which/that
这里用了一个in what
看似很奇怪的答案
这个in是和前面的set up连在一起的
set up in=在.中建造出
而what恰好做从句的主语
2.
定语从句
This is the resson he explained at the meeting
没有选why是因为后面的从句根本没有设计到reason的内容
也就是说如果用why的话 后面必须是一个‘理由’

in 后面接宾语从句 which是不能引导的
第二句 is this the reason 主谓宾已经全了 再用why又不能当宾语从句也不是同位语从句 所以部能选啊