完形填空。阅读下面短文, 从短文后各题所给的四个选项(A、B、C和D)中, 选出可以填入空白处的最佳选项, 并在答题卡上将该项涂黑。
Six continuous days of spring rain had created a fierce and rapid river running by Nancy Brown's farm. As she tried to drive her 1 to higher ground to escape the disastrous flood, she 2 and hit her head on a 3 tree trunk. The fall knocked her 4 for a moment or two. When she came to, Lizzie, one of her oldest and 5 cows, was licking her 6 . The water was constantly 7 .
