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。

选择合适的词填空。

      doesn't   chores    make   feed    will    going    wash   set   homework   trash

    Jack has to do some ____ at home this week, because his mom is ____ on a trip to Beijing. Every morning he has to ____his bed but he ____ have to make dinner. He doesn't have to take out the ____, because his father ____ do that. In the evening, Jack has to ____ the table and then ____ the dishes. He doesn't have to ____ his fish but he has to do his ____!

缩句。

①泗水河畔的春意更浓了。

②年轻的子弟们都能够怀有远大的理想。