Use of English PRO

A (0) ROGUE wave is usually (1) ............ as a wave that is two times the significant wave height of the area. The significant wave height is the average of the highest one-third of waves that (2) ............ over a given period. Therefore, a rogue wave is a lot bigger than the other waves that are (3) ............ in its vicinity around the same time. Joshua Slocum, who completed the world's first solo sail around the world, probably encountered a gigantic wave that (4) ............ the hull of his sailboat in 1895. In 1966, the Italian cruise ship Michelangelo was traveling to New York when it was hit by a wave (5) ............ to be 24 meters high. More recently, in 2005, the cruise ship Norwegian Dawn had its ninth and 10th floor windows (6) ............ by a wave that rose to nearly 21 meters high. These so-called freak waves are not (7) ............ to the Atlantic Ocean or North Sea. One of the places rogue waves appear to happen most frequently is off the southeast coast of South Africa, where a large ocean (8) ............ hits the fast-moving Agulhas current.