4.Most of the large cities in
the world have grown without plans, which London is a such one.
解析：此题为五星级题。在which 之前加among.
which 引导了非限制性定语从句，先行词为the largest cities,所以定语从句应为：London is a such one among most of the
largest cities. 故应在which 之前加介词among。
e.g. He bought a computer, for
which he paid 5 000 yuan.
In the distance there are a
lot of students, one of whom is an old friend of mine.
●锦囊妙计
考虑介词与动词、名词、形容词的固定搭配；及物动词后多介词或不及物动词后缺介词；英语中的固定句型及固定搭配。
●歼灭难点训练