187hhh的《新概念二 lesson 43-45》成绩 - 打字成绩 - 在线打字练习（dazi.91xjr.com）

Lesson 43 Over the South Pole How was the plane able to clear the mountains? In 1929, three years after his flight over the North Pole, the American explorer, R.E. Byrd, successfully flew over the Sou...