51. What does "The Big One" refer to?
A) A gigantic geological fault.
B) A large-scale exercise to prepare for disasters.
C) A massive natural catastrophe.
D) A huge tsunami on the California coast.
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52. What is the purpose of the Cascadia Rising drill?
A) To prepare people for a major earthquake and tsunami.
B) To increase residents' awareness of imminent disasters.
C) To teach people how to adapt to post-disaster life.
D) To cope with the aftermath of a possible earthquake.
53. What happens in case of a megathrust earthquake according to the passage?
A) Two plates merge into one.
B) A variety of forces converge.
C) Boundaries blur between plates.
D) Enormous stress is released.
54. What do the officials hope to achieve through the dills?
A) Coordinating various disaster-relief efforts.
B) Reducing casualties in the event of a disaster.
C) Minimizing property loss caused by disasters.
D) Establishing disaster and emergency management.
55. What does the author say about "The Big One"?
A) Whether it will occur remains to be seen.
B) How it will arrive is too early to predict.
C) Its occurrence is just a matter of time.
D) It keeps haunting Cascadia residents.
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