阅读下面短文，从短文后各题的A、B、C、D四个选项中，选出适合填入对应空白处的最佳选项，并在答题卡上将该选项涂黑。
I ran across an old photo of him—my pet dog—the other day, thinking of some old things. He’s been dead for 25years. His name was Rex.
26 was his favorite recreation. He had so much 27 in the water as any person I have known. You didn’t have to throw a stick in the water to 28 him to go in. Of course, he would bring back a stick to you if you 29 throw one in.
That 30 me of that night, when he brought back a small 31 that he found somewhere— how 32 nobody ever knew. Since it was Rex, it 33 easily have been half a race. The box wasn’t a good one. It was just a(n) 34 old piece that somebody 35 . Still it was something he wanted, probably 36 there was some difficulty in transportation.
