完成对话。在对话的空格中填上适当的单词，使对话完整正确。一空一词。

A: What's wrong with you, Mrs King? You look so sleepy.

B: I don't feel well. I find it not easy to fall asleep at night and sometimes I even keep ____ the whole night.

A: You'd better go to see a doctor. Sleep really____ a lot to your health.

B: Yes, that's right. The doctor warned me about the____the sleeping trouble might have on me. He gave me some medicine and told me to count numbers in bed if I failed to go to sleep. I've had medicine for quite some time. What ____ me now is that the medicine and counting have ____little. Recently, things got even worse. Now I have to____ the fact that I’m gradually losing my memory.

Sometimes I can't find the things that I  put ____ a moment ago. Yesterday I had to take a taxi home, for I lost the key to my car.

A: Why not find another way out instead? You may consider having sports, and Chinese Tai Chi (太极拳) could be a ____. I've  been

practicing it for a few months and now I feel more energetic. Would you like to have a try?

B: I'm afraid it's difficult to learn as I have got little____ about it.

A: In most cases, things are  not just as what you see from the outside. Tai Chi is not so hard as you imagine but you need to be____ enough.

B: I see. I will start to learn it and never stop in half way.