完形填空。阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项。
One afternoon in January in 1998, Susan Sharp, 43, and her 8-year-old son David, were walking across an icy square, when Susan's cane(手杖) slipped on the ice. Her face 1 first into the mud. David 2 her mother's side, “Are you all right, Mom” 3 , Susan pulled herself up, “I'm okay, Honey,” she said.
