题目选项分析

In 1926, in her second attempt to swim across the English Channel,Gertrude Ederle not only crossed the Channel against currents that forced her to swim thirty-five miles instead of the minimal twenty-one, but, swimming the distance almost two hours faster than anyone had yet done, she also set a record for speed.

In 1926, in her second attempt to swim across the English Channel,Gertrude Ederle not only crossed the Channel against currents that forced her to swim thirty-five miles instead of the minimal twenty-one, but also set a record for speed, swimming the distance almost two hours faster than anyone had yet done.