to know exactly what to do when they became ill 是谁的从句
In the past,people tended to think that it was sufficient for good health to have a good doctor who could be relied on to know exactly what to do when they became ill.
在过去,人们倾向于认为,为了健康这样就够了：有一个可以信赖的医生,以准确地知道当他们生病的时候该怎么做.
还是
再过去,人们倾向于认为,为了健康有一个可信赖的医生就够了,以准确地知道当他们生病的时候该怎么做.
就是说 to know exactly what to do when they became ill 是跟 have doctor 连的?还是跟 it was sufficient 连的?