题目

I could have easily gone through life without getting to know one of the most romantic feelings---love for a dog.      For at least ten years my   41    had been suggesting that we get a dog. There were several reasons why the idea     42    . We had noticed that, on our block, couples with no children have a rule:   43    one large or two small dogs. So we got one puppy     44   we two had no children.      He flew into the house with the    45     of a Formula 1 (一级方程式赛车). In several minutes he ran over all the house,     46   6．It's veryhelpful/helpfl/for him to learn to swim．