Question

英语问题如下(请正确，详细解答，谢谢）

introduce与introduction的区别。
关于限制性定语从句和非限制性定语从句有什么关系，什么as和which的区别r，有逗号的是非限制性定语从句我都搞不清楚了。拿到一个句子有逗号的我就想是不是非限制性定语从句，再有as和which我就不知做题思路了，请麻烦讲解一下。
Have you ever been toHangzhou,---------which is famous for the West Lake?
Have you ever been to Hangzhou,---------lies the West Lake?
I live in beijing,--------is the capital of China.
There was in the street -------I met John yesterday.
Who------knows him wants to make friends with him?
This is Mr.John for -------on I brought a book yesterday.
This is Mr.John for---------I bought a book yesteray.(以上都填关系词）
4.People spoke highly of the driver --------,in spite of the terrible weather,had saved his passengers from danger.Awhich Bwho Cwhom Das
---------Engels pointed out,labour created man himself.
Awhich BAs CSince DFor
John is from Britain ,---------mentioned in our talk.Awhich Bas Che Dit
This machine ,-------might be expected,has stopped operating.
Athat Bit Cfor it Das
Li Ming ,-------to the concert,enjoyed it very much.
AI went with B with whon I went C with who I went D I went with him

Answer 1

which

which

which

which

where
that
which
whom
A
B
B
A
B
有问题就来求解答网啊

Answer 2

which which which which
where
that
which
whom
A
B
B
A
B