第一节：完形填空(共10小题；每小题2分，满分20分)
阅读下面短文，掌握其大意，然后从21-30各题所给的四个选项A、B、C和D中，选出最佳选项。
On August 26, 1999, New York City was struck by a terrible rainstorm. The rain caused the streets to 21 and the subway system almost came to a stop.
Unfortunately, this happened during the morning rush hour. Many people who were going to work were 22 to go home, Some battled to 23 a taxi or to get on a bus. Still others faced the storm bravely, walking miles to get to work.
