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1. C ( Tsunamis, whose name derives from the Japanese expression for ʻhigh wave in a harbourʼ, are giant sea waves./ In the open ocean, tsunami waves are not very high, often no more than one or two metres. It is when they hit the shallow waters near the coast that they increase in height, possibly up to 40 metres.)
2. B (They are also referred to by the general public as tidal waves although they have nothing to do with tides. Scientists often refer to them as seismic sea waves, which is far more appropriate because they are often the result of undersea seismic activity.)
3. A tidal waves
4. D displace = move : dời chỗ, di chuyển
5. D shallow : nông = not deep
6. A (Typhoon Haiyan is one of the strongest tropical cyclones ever observed.)
7. B (Recovery from the monster typhoon, locally known as Yolanda, would be long and difficult.)
8. C (It ripped through the Philippines, and the destruction across the islands was disastrous and widespread.)
9. A (About 9.5 million people have been affected by the typhoon.)
10. B (Typhoon Haiyan weakened to a tropical storm, but at least five people died in Vietnam when Haiyan hit the country.)