Englishfor English speakers
f
Noun
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F is the sixth letter of the alphabet.
"e" comes before "f"
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In some schools, an F is a grade that shows that you have failed completely.
This student has not made any attempt in the exam; he only got an F.
o
Noun
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The fifteenth (15th) letter of the alphabet. It is a vowel.
"o" comes after "n" and before "p"
b
Noun
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B is the second letter of the alphabet.
"b" comes after "a" but before "c"
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In some schools, a B is a fairly high grade.
Charles got a B in his maths test.