Hurricanes (also known as tropical cyclones) are severe tropical storms that form in the southern Atlantic
Ocean, Caribbean Sea, Gulf of Mexico, and the eastern Pacific Ocean. They are caused by a 6 of water vapor
and heat energy, which together cause the air to begin rotating. Hurricanes have wind speeds of over 75 miles (121
kilometers) per hour. 7 the wind can reach up to 190 mph (289 kph). Hurricanes are most violent just around the central “eye,” an area that is normally very calm. Hurricanes’ strong
winds and heavy rain can cause severe flooding, which can be 8 to anyone in their path. One of the deadliest
hurricanes ever to hit the United States occurred in 1900 in Galveston, Texas. More than 6,000 people were killed.
Hurricanes can also cause billions of dollars in 9 . Hurricanes have a life span of one to thirty days. 10 they form over the water, they can cause extensive
flooding inland. However, once hurricanes touch land, they tend to lose strength quickly.
【題組】7
(A) Sometimes
(B) Always
(C) As usual
(D) Sooner or later