Here is a question:
The magnitude of yesterday's earthquake has been determined by seismologists, but what really intrigues government officials are how to both detect warning singns of an earthquake and predict its location of impact.
My question is the following :
The right answer is :
has been determined by seismologists, but what really intrigues government officials is
This is what I said when I took the exam I don't know what is the rule to figure out the right answer?
Could you help me on that?
Thanks!
The magnitude of yesterday's earthquake has been determined by seismologists, but what really intrigues government officials are how to both detect warning singns of an earthquake and predict its location of impact.
My question is the following :
The right answer is :
has been determined by seismologists, but what really intrigues government officials is
This is what I said when I took the exam I don't know what is the rule to figure out the right answer?
Could you help me on that?
Thanks!

















