RMR: Rick Goes Whitewater Rafting
https://www.youtube.com/watch?v=gxlijMkrkpg 3:37 we challenged ourselves down the Class II Class III rapids squashing down the roaring river and gushing water. 難易度2,3の急流。
Discover pura vida in Costa Rica
https://www.youtube.com/watch?v=awybH3_9WTA 36:38 white rapids
Hurricane Sandy on the Disaster of Super Storm Sandy Full Documentary https://www.youtube.com/watch?v=6tk1IZkGhhI 0;03 the Niagara Falls 華厳の滝はもちろん Kegon Falls となる。
Daredevil Nik Wallenda prepares to tightrope over Niagara Falls
参考リンク
http://bridge-english.blogspot.jp/2016/05/verrazanonarrows-bridge.html Verrazano–Narrows Bridge ベラザノ・ナローズ橋
練習問題解答
a-6679 from treacherous rapids
a-7878 rapids
b-0825 rapids