单词拼写（共10小题；每小题1分，满分10分）
第一节　根据所给首字母和中文提示完成各句，使句意通顺。（共5小题；每空1分，满分5分）
The club is for t_______ who are between 13 and 19 years old.
You can’t ask a lady about her age in public because it will make her e______.
The famous professor gave us an _________ (解释) of how sound travels in water.
Mary looks _________ (苗条) than Helen.
I am _________ (羞愧) that you should dress like this.