题目

完形填空 It was many years ago. Iwas a1father on my way home to mywife and baby boy after spending all day2college classes. I had goneback to school to get a degree in education. I wanted to secure a3job that would help me tobuild a better life for my growing family. It was a two-hour round trip to the4, so every day I would prayfor my 20-year-old car to5it all the way. As I started down a lonelystretch of highway about 12 miles from my home I 6 a car parked along the side of the road withits emergency flashers7. A small woman wasstruggling to8a flat tire. This was longbefore the age 制作泡菜时密封的主要目的是（　　）A．防止营养物质的流失B．防止其他细菌的进入C．防止空气进入D．防止水分散失