Is this the best way you thought of ________ people from getting into the dangerous areas?
A.to prevent B.preventing C.prevented D.having prevented
为什么不可以是you thought作为插入语,而且the way of doing和the way to do的用法是可以通用的,改为陈述句也可以是i thought this is the best way of preventing people from...= this is the best way (i thought) of preventing people from...=this is the best way (i thought) to prevent people from...think是想到,think of 是再三考虑后的结果,在该句中因为没有上下文所以不予以比较.而且就百度百科来看一般只有i think作为插入语,i think of 没有见到