阅读下面短文，掌握大意，然后从各题所给的四个选项中选出一个最佳选项。
It was a cold winter's night when I stopped for gas on my way home from work. I felt 1 and had a slight headache.
I worked in a 2 doctor's office. During those days, the office was often 3 people who had a cold, which made me even busier than usual. It seemed I was going to be late 4 home and my husband would be ready to pronounce me late once again. But maybe 5 I hurried, I could still make it.
I was heading inside to 6 for my gas when I noticed an old couple（夫妻）at the counter. I heard them asking the 7 to the nearest hospital. It was the hospital that I had just 8 a few minutes ago.
The young man at the counter was trying to be 9 by explaining how to get there. But the fact was that he was telling them a whole 10 route. So I walked over to the couple and said, “Would you like to 11 me to the hospital?” Then I saw a look of relief（轻松）over their faces. “I'm going there, too,” I said, which wasn't a lie since I had just 12 up my mind to do it perfectly.
I got in my car and began to drive 13 . I looked back several times to be 14 they were right behind me. It took us only fifteen 15 to get there as rush hour traffic was beginning to die down. I felt better than I did all day and my headache was nearly gone.
R)的图象按向量(m,0) 平移后，得到函数y=-f′(x)的图象，则m的值可以为（ ）