(2013·杭州模拟)Children are excited about the approach of Christmas, 　　　may bring great happiness to them

Tom, you get dead drunk again! —_______ It’s none of your business.

One of the ______.

_____ hard you may try, you can’t possibly persuade Tom to give up smoking, for he is so addicted to it.[ ]

Look! There is a horse racing program on TV now.— Hmm …. It __exciting.