字母C在英语字母表中排第三。

The letter ___C is the third in the English alphabet.

这首歌的第一个音符是C。

The first note of this song is ___C.

在罗马数字中，C代表100。

The Roman numeral ___C represents one hundred.

虽然他在化学考试中只得了C，但这意味着他及格了。

He got a ___C on his chemistry test, which means he passed.

今天的气温是25摄氏度。

The temperature today is 25°___C.