根据句意及首字母或汉语提示写出单词
The  blind  people  usually have  a  keener (敏锐的) s           of hearing than healthy people.
She g            at her watch and began to get ready for her holiday.
Children should learn how to c     their living expenses when they grow up.
The plane was soon out of s        in the sky.
She heard the sound of f           outside her house last night, which really frightened her.
The room was in complete               (黑暗) , without a light.
You can hear its heart        (跳动).
           (一旦) you let him go, he will never come back.
I like walking along the coast at sunset, feeling the light wind ________（轻抚）my face.
Joe spent the whole afternoon         (观察)  the experiment that he was doing.