单词'sorry'的最后一个字母是y。

The word 'sorry' ends with the letter ___y.

在这个公式中，y代表垂直方向的速度。

In this formula, ___y represents the velocity in the vertical direction.

你为啥不告诉我这件事？

___Why didn't you tell me about this?

她问我要不要吃披萨，我回答说“要”。

When she asked if I wanted pizza, I replied "___yes".