of which 定语从句怎么确定which指什么？（英语语法

cars sales is 100 million in China ,of which......。

which指的是最靠近of which的China，还是car sales？ 具体得看后面的of which 所在的定语从句所要表达的含义。

1）In 2019 cars sales is 100 million in China, of which 70% come from the sales of commercial passengers vehicles.

2）In 2019 cars sales is 100 million in China, of which we three market analysts were much sure even 5 years ago.

3) In 2019 cars sales is 100 million in China, of which the Volkswagen has been much confident in its expectations.

指代前面的中心词cars sales.不能指代in China

你最好多给一点下文，好吗？
从这儿仅有的语境来看，which是指sales。
上下文很重要，词句的理解都离不开上下文的。

car sale

which在这里指的是cars sales