单项选择题

When is an ordinary tropical storm called a hurricane

A.When it begins in the Atlantic and Caribbean seas．
B.When it hits the coastline．
C.When it iS more than 75 miles wide．
D.When its winds reach 75 miles per hour．

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B.Elite．
C.Immigrants．
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单项选择题How does Walter get along with his new business

a. He has failed in business again.
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When is an ordinary tropical storm called a hurricane