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 also set a record for speed, swimming the distance almost two hours faster than anyone had yet done.

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.