要输入大写字母，请按住 Shift 键。

To type a capital letter, press and hold the shift ___key.

她通过准确地按压每个琴键来练习音阶。

She practiced scales by pressing each piano ___key precisely.

只需按下回车键，你就可以搜索文件。

You can search for files by simply pressing the Enter ___key.