单项选择题

E

I’m more of a host than a guest. I like people to stay with me but do not care about staying with them, and usually say I am busy. I think the life without friends is regrettable; the life without quietness is terrible. The only people I ask to stay with me are those 1 like. But I am still more delighted when they go, and the house is ours again. I feel that I may be mistaken in these guests, and this may happen at times. They leave me more room in which to live properly. My mind, like my body, wears its old clothes again. I like to think about life in this world, and it is not easy to do this when talkative people are all over the place. With the guests about, I find myself a solid. I feel uneasy. Often I feel I have nothing meaningful to say. I try my best to think of something interesting and useful to devote them. But usually it seems that no one appreciate what I focus on. Many times I even got angry over what they said, which made them upset. Frankly speaking; I am not used to gathering together with friends chatting, although I’d like them to stay with me. Somehow I feel nervous with them. But as soon as they have gone, I release myself completely. I expand into a gas again. And a gas can have more delight than solid. So goodbye! Guests.

The writer says he turns into a "gas" ______.