题目

I experienced great bitterness five years ago. At that time, my father _______ from an accident. As the eldest son, I had no _______ but to drop out of school and work in a factory. I didn’t dare to ask for more, just hoping to _______ my two younger brothers. However, that’s not a(n)_______ thing, for I couldn’t afford to _______ their tuition (学费) even if I worked from day to night. Without my father’s protection, I _______ I was only a slave to the life.Later on, something changed my life. I still remember that it was a _______ day. I walked slowly in the _______. Suddenly the r关于位移、速度、加速度，以下说法中正确的是（　） A．速度减小时，位移一定在减小 B．速度增大时，位移一定在增加 C．加速度减小时，速度不一定减小 D．加速度增大时，速度一定增大