Time is very important in our life. However, I had never realized it until I received a beautiful gold watch from my father one day when I was 19 years old. This 1 always tells me the importance of time in my life.

    It was a cold rainy day. My father asked me to go to the 2 to pick up my uncle and take him home. I should have arrived there 3 4:30 p.m. We had a basketball match at school that afternoon 4 the match was too exciting. When the match was nearly over, I suddenly remembered my uncle and 5 to the airport. It was too late. He had left the airport and taken a taxi to our house.

    I was very worried that my father would be 6 with me. As soon as I entered the living room, I saw my uncle in the sofa looking very tired. I dared not 7 my uncle and father. I said hello to them in a very low voice. My father didn't say 8. Instead, he asked me to sit next to him. "Peter, did you have a good time today?" He 9 very disappointed, but his voice was still calm. I felt so sorry and answered in an even 10 voice. "Yes, Dad, but I'm really sorry about not 11 my uncle. This will 12 happen again. I promise." My father handed me a box with a beautiful gold watch inside. It was a gift my uncle bought for him. He gave it to 13 and said, "I hope you have learned something important today, and this watch will help you remember the importance of him."

    The watch has been with me for 12 years. I wear it not because of its price, but because of 14 I learned from it. It tells me to respect 15 and never be late to do what I have promised to.

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。

    牛奶，最古老的天然饮料之一，被誉为“白色血液”，对人体的重要性可想而知，牛奶也就成了人们喜欢的食用营养品。①____，每一百克牛奶中含脂肪就在4克以上，这个脂肪含量对那些身体肥胖和血脂较高的人来说，是个不利因素。目前市面上牛奶的添加物也相当多，如高钙牛奶，②____。③____，但对于老年人来说，过多饮用牛奶补钙得不偿失，因为牛奶也能促使老年白内障的发生。其原因是牛奶含有5%的乳糖，极易沉积在老年人的眼睛晶状体，并影响其正常代谢，而且蛋白质易发生变性，导致晶状体透明度降低，而诱发老年性白内障，或者加重其病情。