根据短文内容,从A、B、C、D四个选项中选出一个能填入相应空格内的最佳答案,并把答题卡上对应题目的答案标号涂黑。

My father brought home sailboat when I was ten, and almost each Sunday in summers we would go sailing. Dad was quite skilled in sailing, but not good at ________. As for me, I learned both before twelve because of living close to Lake Ontario.

The last time Dad and I set sail together is really unforgettable .It was a perfect weekend after graduated from university. I came home and ________ Dad to go sailing. Out we set soon on the calm lake. Dad hadn't sailed for years ,but everything went well with the tiller(船柄) in his hands.

When we were in the middle of the lake, a ________ wind came. The boat was hit heavily .Dad was always at his best in any situation, but at this moment was scared.

“John! ________!” he shouted in a trembling (颤抖的)voice, with the tiller still in his hands.

In my memory he could solve any problem .He was the one I always ________ for power and security (安全). Before I could answer, a wave of water got into the boat. I rushed to the tiller ________it was too late. Another huge wall of water over the boat in a minute.We were thrown ________ the water, and Dad was struggling (挣扎)aimlessly. At that moment, I felt truly protective of him.

I swam to Dad ________ and helped him in climbing onto the hull (船壳) of the boat. Upon sitting on the hull, Dad was little embarrassed about his flash of ________ "It's all right, Dad. We are safe now." I comforted him.

That was the first time Dad had depended on me in a moment of emergency (紧急). More importantly, I found it was my turn to start ________ my father.