" In Sendai(仙台), they were about three meters. At least in that area they were not expecting such a sizeable wave because they would have built a higher seawall."
A tsunami wave can travel as fast as 800 kilometers per hour. To get to higher ground people would often have to travel for many kilometers. This can take more time than a fast traveling tsunami will permit. This is especially true in cases like Japan. The tsunami waves followed almost immediately.
Experts say early warning systems will continue to be limited by these facts until earthquakes and tsunamis can be predicted.
17. What is the main idea of the first paragraph?
A. A powerful earthquake hit Japan.
B. Japan has the best earthquake early warning system.
C. Japan can report an earthquake before it happens.
D. Better equipment should have been used.
18. According to Costas Synolakis, ________.
A. Japan had a warning of such a serious earthquake
B. Japan has experienced the worst earthquake worldwide
C. the Japanese should have built higher seawalls
D. The Japanese were not really prepared for such a disaster
19. According to the writer, why hadn’t people got to higher ground?
A. Because tsunami doesn’t leave much time for them.
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