英语字母表中的第六个字母是F。

The sixth letter in the English alphabet is ___F.

我担心这门课会得F。

I'm afraid I might get an ___F in this course.

今天气温达到了90华氏度。

The temperature reached 90 degrees ___F today.

看到考试成绩时，她小声嘟囔了一句'去他妈的'。

She muttered '___F this' under her breath when she saw her test score.

这首曲子的第一个音是F。

The first note of this song is ___F.