请认真阅读下面短文，并根据各题所给首字母的提示，写出一个合适的英语单词完整、正确的形式，使短文通顺。

When you wave to a friend, you are using sign language. When you smile at someone, you mean to be 小题1:f_____. When you put one finger in front of your 小题2:m_____, you mean “Be quiet.”

Yet, people in different countries may use different sign languages. Once an Englishman was in Italy. He could speak little Italian. One day when he was walking in the street, he felt小题3:h_____ and went into a restaurant. As the waiter came, the Englishman 小题4:o_____ his mouth, put his fingers into it and took them out again and moved his lips (嘴唇). In this way, he meant to say, “小题5:B_____ me something to eat.” But the waiter gave him a lot of things to小题6:d_____. First tea, then coffee, then milk, but no food. The Englishman was sorry that he wasn’t小题7:a_____ to tell the waiter what he wanted. He was just going to小题8:l_____ the restaurant when another man came in and put his hands on his stomach. And this sign was clear小题9:e_____ for the waiter. In a few minutes, the waiter brought him a large plate of bread and meat. At last the Englishman had his meal in the 小题10:s_____ way.

在一定的压力下，流体体积随温度升高而（）的特性称为流体的膨胀性。

A、缩小

B、增大

C、不变

D、无规则变化