题目

It was a cold winter morning. Half asleep at the train station, I stared into the distance,   36   for the train to take me to my   37   in Boston. The word was quiet. The very few people on the street kept to themselves,   38   their steaming cups of coffee. Reaching into my pocket as the   39  was approaching, my numb hand searched for the $ 20 bill to pay my fare. The pocket was   40  ! I searched through my bag and then I felt   41  . Unless the money dropped from the sky, I’d be   42   there. “What’s the matter?” A short, elderly man stood before me. “Oh已知ab=4，若﹣2≤b≤﹣1，则a的取值范围是（　　）A．a≥﹣4B．a≥﹣2C．﹣4≤a≤﹣1D．﹣4≤a≤﹣2