A ________ is a tropical storm which reaches 120 km per hour in North and South America. A. cyclone B. typhoon C. hurricane D. tornado

A ________ is a tropical storm which reaches 120 km per hour in North and South America. 
A. cyclone       
B. typhoon       
C. hurricane      
D. tornado

→When a tropical storm reaches 120 kilometers per hour, it is called a hurricane in North and South America, a cyclone in Australia, and a typhoon in Asia. (sách giáo khoa unit9 trang 78 có)