Question

几个关于定语从句的问题，不懂，求详解，谢谢啦

2.There isn’t so much noise in the country ———— in big cities.
A．as B．where C．which D．that答案是A，它在句中作什么成分呢
3.There seem few cities _____the movie superstar wants to go, for he has been to almost every corner of the world.
A. that B. which C. where D. /为啥不用B而用C,看不明白了
4.The park opposite our office contains a lawn, _____ very pleasant to sit on in the sun.
A. it is B. which it is C. where it is D. which is为啥选B而不选择D
5.There isn’t so much noise in the country ——in big cities.
A．as B．where C．which D．that选A它在句子中做什么成分呢
6.The clever boy made a hole in the wall, —— he could see what it was going on inside the house.
A．on which B．at which C．through which D．in which同样的问题句子中what it was going....为什么不是what was going
The disease attacks such birds as parrots and canaries.从句中的as做什么成分，看不懂啊。

Answer 1

2. 这个不是定语从句， 是as....as 的比较状语从句。
3. which 在从句中做主语或宾语，这句从句 the movie superstar wants to go (to the city ) 你看，先行词the city 在从句中做状语。所以用where.
4. 先行词是 lawn .从句中有......to sit on ，这个on 是介词，后面要有宾语，显然是 a lawn 做on 的宾语，所以用which, （it is very pleasant to sit on the lawn.)但是如果直接用which 的话，从句_____very plaesant 又缺主语，又会把lawn 看成 做句子的主语了变成 the lawn is very pleasant to sit on.了。这种表达是错误的。
5.6.你是对的，应该是...see what was going on.
这是such...as 的短语。as 是介词。