设函数f(x)可导，且，求。_爱下问搜题

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设函数f(x)可导，且，求。

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I was 16 and I grew up in a community called Estepona. One morning, Dad told me I could drive him into a ___31___ village called Mijas, on condition that I took the car in to be ___32___ at a nearby garage. I readily accepted. I drove Dad into Mijas, and ___33____ to pick him up at 4 pm, then dropped off the car at the ___34___. With several hours to spare, I went to a theater. ___35___, when the last movie finished, it was six. I was two hours late!
　　 I knew Dad would be angry if he ___36___ I'd been watching movies. So I decided not to tell him the truth. When I ____37____ there I apologized for being late, and told him I'd ___38__ as quickly as I could, but that the car had needed some major repairs. I'll never forget the ___39___ he gave me. "I'm disappointed you ___40___ you have to lie to me, Jason." Dad looked at me again. "When you didn't ___41___, I called the garage to ask if there were any ___42___, and they told me you hadn't yet picked up the car." I felt ____43___ as I weakly told him the real reason. A___44___passed through Dad as he listened attentively." I'm angry with ___45___. I realize I've failed as a father. I'm going to walk home now and think seriously about___46___ I've gone wrong all these years." "But Dad, it's 18 miles!" My protests and apologies(道歉) were __47___. Dad walked home that day.I drove behind him, ___48___ him all the way, but he walked silently.
　　 Seeing Dad in so much ___49___ and emotional(情感的) pain was my most painful experience. However, it was ___50____ the most successful lesson. I have never lied since.

B．nervousness

D．meaningless

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