Question

The clean-energy business is turning into the next big inves

Answer 1

首先,这是一个名词从句,用Which还是in which是要看你后面那个句子决定的,比如,你现在这个句子是risks are often——它修饰的是“the next big investment boom”,你先看“the next big investment boom”在“risks are often——”做什么成分,你可以填进去,也就是risks are often ( in ) “the next big investment boom”,连起来的时候是不是要加“in”,所以是in which